38457639 has 32 divisors (see below), whose sum is σ = 64174080. Its totient is φ = 22550400.

The previous prime is 38457611. The next prime is 38457649. The reversal of 38457639 is 93675483.

38457639 is a `hidden beast` number, since 3 + 8 + 4 + 5 + 7 + 639 = 666.

It is not a de Polignac number, because 38457639 - 2⁵ = 38457607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38457594 and 38457603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38457649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7119 + ... + 11295.

It is an arithmetic number, because the mean of its divisors is an integer number (2005440).

Almost surely, 2^38457639 is an apocalyptic number.

38457639 is a deficient number, since it is larger than the sum of its proper divisors (25716441).

38457639 is a wasteful number, since it uses less digits than its factorization.

38457639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228 (or 4222 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 38457639 is about 6201.4223368514. The cubic root of 38457639 is about 337.5417824814.

The spelling of 38457639 in words is "thirty-eight million, four hundred fifty-seven thousand, six hundred thirty-nine".