38400438 has 16 divisors (see below), whose sum is σ = 77201136. Its totient is φ = 12733440.

The previous prime is 38400431. The next prime is 38400443. The reversal of 38400438 is 83400483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38400431) 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, 15423 + ... + 17738.

It is an arithmetic number, because the mean of its divisors is an integer number (4825071).

Almost surely, 2^38400438 is an apocalyptic number.

38400438 is an abundant number, since it is smaller than the sum of its proper divisors (38800698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38400438 is a wasteful number, since it uses less digits than its factorization.

38400438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33359.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 38400438 is about 6196.8086948041. The cubic root of 38400438 is about 337.3743488363.

The spelling of 38400438 in words is "thirty-eight million, four hundred thousand, four hundred thirty-eight".