40400538 has 16 divisors (see below), whose sum is σ = 83587680. Its totient is φ = 13002416.

The previous prime is 40400527. The next prime is 40400557. The reversal of 40400538 is 83500404.

It is a happy number.

40400538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 115920 + ... + 116267.

It is an arithmetic number, because the mean of its divisors is an integer number (5224230).

Almost surely, 2^40400538 is an apocalyptic number.

40400538 is an abundant number, since it is smaller than the sum of its proper divisors (43187142).

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

40400538 is a wasteful number, since it uses less digits than its factorization.

40400538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232221.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40400538 is about 6356.1417542405. The cubic root of 40400538 is about 343.1329174586.

The spelling of 40400538 in words is "forty million, four hundred thousand, five hundred thirty-eight".