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30189041 = 231312567
BaseRepresentation
bin111001100101…
…0010111110001
32002210202120122
41303022113301
530212022131
62555020025
7514413461
oct163122761
962722518
1030189041
111604a523
12a13a615
13634004c
14401bba1
1529b4d7b
hex1cca5f1

30189041 has 4 divisors (see below), whose sum is σ = 31501632. Its totient is φ = 28876452.

The previous prime is 30189031. The next prime is 30189073. The reversal of 30189041 is 14098103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30189041 is a prime.

It is a super-2 number, since 2×301890412 = 1822756392999362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30189041.

It is not an unprimeable number, because it can be changed into a prime (30189031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656261 + ... + 656306.

It is an arithmetic number, because the mean of its divisors is an integer number (7875408).

Almost surely, 230189041 is an apocalyptic number.

It is an amenable number.

30189041 is a deficient number, since it is larger than the sum of its proper divisors (1312591).

30189041 is a wasteful number, since it uses less digits than its factorization.

30189041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312590.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 30189041 is about 5494.4554780251. The cubic root of 30189041 is about 311.3745448683.

The spelling of 30189041 in words is "thirty million, one hundred eighty-nine thousand, forty-one".

Divisors: 1 23 1312567 30189041