40038890 has 16 divisors (see below), whose sum is σ = 75863520. Its totient is φ = 15172560.

The previous prime is 40038839. The next prime is 40038907. The reversal of 40038890 is 9883004.

It is a super-2 number, since 2×40038890² = 3206225424864200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105176 + ... + 105555.

It is an arithmetic number, because the mean of its divisors is an integer number (4741470).

Almost surely, 2^40038890 is an apocalyptic number.

40038890 is a deficient number, since it is larger than the sum of its proper divisors (35824630).

40038890 is a wasteful number, since it uses less digits than its factorization.

40038890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210757.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40038890 is about 6327.6290978533. The cubic root of 40038890 is about 342.1059883759.

The spelling of 40038890 in words is "forty million, thirty-eight thousand, eight hundred ninety".