40156640 has 24 divisors (see below), whose sum is σ = 94870440. Its totient is φ = 16062592.

The previous prime is 40156637. The next prime is 40156661. The reversal of 40156640 is 4665104.

It is a happy number.

40156640 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 2×40156640² = 3225111472179200, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 125330 + ... + 125649.

It is an arithmetic number, because the mean of its divisors is an integer number (3952935).

Almost surely, 2^40156640 is an apocalyptic number.

40156640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40156640 is an abundant number, since it is smaller than the sum of its proper divisors (54713800).

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

40156640 is a wasteful number, since it uses less digits than its factorization.

40156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250994 (or 250986 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40156640 is about 6336.9266999075. The cubic root of 40156640 is about 342.4410255963.

The spelling of 40156640 in words is "forty million, one hundred fifty-six thousand, six hundred forty".