Search a number
-
+
190049031 = 337038853
BaseRepresentation
bin10110101001111…
…10101100000111
3111020121111021000
423110332230013
5342123032111
630505224343
74465250544
oct1324765407
9436544230
10190049031
1198306717
12537920b3
13304b1b63
141b351bcb
1511a40c56
hexb53eb07

190049031 has 8 divisors (see below), whose sum is σ = 281554160. Its totient is φ = 126699336.

The previous prime is 190049029. The next prime is 190049033. The reversal of 190049031 is 130940091.

It is an interprime number because it is at equal distance from previous prime (190049029) and next prime (190049033).

It is not a de Polignac number, because 190049031 - 21 = 190049029 is a prime.

It is a super-2 number, since 2×1900490312 = 72237268368077922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7038853 = 190049031 / (1 + 9 + 0 + 0 + 4 + 9 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190048986 and 190049004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190049033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3519400 + ... + 3519453.

It is an arithmetic number, because the mean of its divisors is an integer number (35194270).

Almost surely, 2190049031 is an apocalyptic number.

190049031 is a deficient number, since it is larger than the sum of its proper divisors (91505129).

190049031 is an equidigital number, since it uses as much as digits as its factorization.

190049031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038862 (or 7038856 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 190049031 is about 13785.8271786643. The cubic root of 190049031 is about 574.9391552505.

The spelling of 190049031 in words is "one hundred ninety million, forty-nine thousand, thirty-one".

Divisors: 1 3 9 27 7038853 21116559 63349677 190049031