438624261 has 8 divisors (see below), whose sum is σ = 649813760. Its totient is φ = 292416156.

The previous prime is 438624229. The next prime is 438624281. The reversal of 438624261 is 162426834.

438624261 is a `hidden beast` number, since 4 + 3 + 8 + 624 + 26 + 1 = 666.

It is not a de Polignac number, because 438624261 - 2⁵ = 438624229 is a prime.

It is a super-2 number, since 2×438624261² = 384782484675592242, 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 (438624281) 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, 8122645 + ... + 8122698.

It is an arithmetic number, because the mean of its divisors is an integer number (81226720).

Almost surely, 2^438624261 is an apocalyptic number.

It is an amenable number.

438624261 is a deficient number, since it is larger than the sum of its proper divisors (211189499).

438624261 is a wasteful number, since it uses less digits than its factorization.

438624261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16245352 (or 16245346 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 438624261 is about 20943.3583983085. The cubic root of 438624261 is about 759.7969569552.

The spelling of 438624261 in words is "four hundred thirty-eight million, six hundred twenty-four thousand, two hundred sixty-one".