40156440 has 32 divisors (see below), whose sum is σ = 120469680. Its totient is φ = 10708352.

The previous prime is 40156427. The next prime is 40156447. The reversal of 40156440 is 4465104.

It is a super-2 number, since 2×40156440² = 3225079346947200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40156440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40156447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167199 + ... + 167438.

Almost surely, 2^40156440 is an apocalyptic number.

40156440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40156440 is an abundant number, since it is smaller than the sum of its proper divisors (80313240).

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

40156440 is a wasteful number, since it uses less digits than its factorization.

40156440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334651 (or 334647 counting only the distinct ones).

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

The square root of 40156440 is about 6336.9109193676. The cubic root of 40156440 is about 342.4404570866.

The spelling of 40156440 in words is "forty million, one hundred fifty-six thousand, four hundred forty".