40120816 has 20 divisors (see below), whose sum is σ = 82307232. Its totient is φ = 18880256.

The previous prime is 40120813. The next prime is 40120819. The reversal of 40120816 is 61802104.

It is an interprime number because it is at equal distance from previous prime (40120813) and next prime (40120819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73480 + ... + 74023.

Almost surely, 2^40120816 is an apocalyptic number.

It is an amenable number.

40120816 is an abundant number, since it is smaller than the sum of its proper divisors (42186416).

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

40120816 is a wasteful number, since it uses less digits than its factorization.

40120816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147528 (or 147522 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 40120816 is about 6334.0994624335. The cubic root of 40120816 is about 342.3391640104.

The spelling of 40120816 in words is "forty million, one hundred twenty thousand, eight hundred sixteen".