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2989831 = 13972371
BaseRepresentation
bin1011011001111100000111
312121220021111
423121330013
51231133311
6144025451
734261465
oct13317407
95556244
102989831
111762339
121002287
13808b40
1457b835
153e0d21
hex2d9f07

2989831 has 8 divisors (see below), whose sum is σ = 3254384. Its totient is φ = 2730240.

The previous prime is 2989823. The next prime is 2989849. The reversal of 2989831 is 1389892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2989831 - 23 = 2989823 is a prime.

It is a super-2 number, since 2×29898312 = 17878178817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2989031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 2446.

It is an arithmetic number, because the mean of its divisors is an integer number (406798).

22989831 is an apocalyptic number.

2989831 is a deficient number, since it is larger than the sum of its proper divisors (264553).

2989831 is a wasteful number, since it uses less digits than its factorization.

2989831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its digits is 31104, while the sum is 40.

The square root of 2989831 is about 1729.1127782768. The cubic root of 2989831 is about 144.0618143821.

It can be divided in two parts, 29898 and 31, that added together give a square (29929 = 1732).

The spelling of 2989831 in words is "two million, nine hundred eighty-nine thousand, eight hundred thirty-one".

Divisors: 1 13 97 1261 2371 30823 229987 2989831