40163990 has 16 divisors (see below), whose sum is σ = 73314720. Its totient is φ = 15839040.

The previous prime is 40163947. The next prime is 40163999. The reversal of 40163990 is 9936104.

40163990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40163990² = 3226292185440200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40163999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27575 + ... + 28994.

It is an arithmetic number, because the mean of its divisors is an integer number (4582170).

Almost surely, 2^40163990 is an apocalyptic number.

40163990 is a deficient number, since it is larger than the sum of its proper divisors (33150730).

40163990 is a wasteful number, since it uses less digits than its factorization.

40163990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56647.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 40163990 is about 6337.5066074916. The cubic root of 40163990 is about 342.4619170188.

The spelling of 40163990 in words is "forty million, one hundred sixty-three thousand, nine hundred ninety".