438921087 has 24 divisors (see below), whose sum is σ = 652904448. Its totient is φ = 262027920.

The previous prime is 438921059. The next prime is 438921097. The reversal of 438921087 is 780129834.

It is not a de Polignac number, because 438921087 - 2⁷ = 438920959 is a prime.

It is a super-2 number, since 2×438921087² = 385303441226523138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438921097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15298 + ... + 33344.

It is an arithmetic number, because the mean of its divisors is an integer number (27204352).

Almost surely, 2^438921087 is an apocalyptic number.

438921087 is a deficient number, since it is larger than the sum of its proper divisors (213983361).

438921087 is a wasteful number, since it uses less digits than its factorization.

438921087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18139 (or 18128 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 438921087 is about 20950.4435991222. The cubic root of 438921087 is about 759.9683083507.

The spelling of 438921087 in words is "four hundred thirty-eight million, nine hundred twenty-one thousand, eighty-seven".