40401690 has 64 divisors (see below), whose sum is σ = 117345024. Its totient is φ = 8690688.

The previous prime is 40401689. The next prime is 40401701. The reversal of 40401690 is 9610404.

40401690 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 2×40401690² = 3264593109712200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40401690.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2089 + ... + 9228.

It is an arithmetic number, because the mean of its divisors is an integer number (1833516).

Almost surely, 2^40401690 is an apocalyptic number.

40401690 is an abundant number, since it is smaller than the sum of its proper divisors (76943334).

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

40401690 is a wasteful number, since it uses less digits than its factorization.

40401690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11351.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 40401690 is about 6356.2323746068. The cubic root of 40401690 is about 343.1361788456.

The spelling of 40401690 in words is "forty million, four hundred one thousand, six hundred ninety".