38406590 has 16 divisors (see below), whose sum is σ = 69966288. Its totient is φ = 15177216.

The previous prime is 38406559. The next prime is 38406593. The reversal of 38406590 is 9560483.

It is a self number, because there is not a number n which added to its sum of digits gives 38406590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38406593) 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, 22307 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (4372893).

Almost surely, 2^38406590 is an apocalyptic number.

38406590 is a deficient number, since it is larger than the sum of its proper divisors (31559698).

38406590 is a wasteful number, since it uses less digits than its factorization.

38406590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46363.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 38406590 is about 6197.3050594593. The cubic root of 38406590 is about 337.3923643962.

The spelling of 38406590 in words is "thirty-eight million, four hundred six thousand, five hundred ninety".