40312720 has 40 divisors (see below), whose sum is σ = 107118144. Its totient is φ = 13821312.

The previous prime is 40312693. The next prime is 40312739. The reversal of 40312720 is 2721304.

40312720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 35434 + ... + 36553.

Almost surely, 2^40312720 is an apocalyptic number.

40312720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40312720 is an abundant number, since it is smaller than the sum of its proper divisors (66805424).

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

40312720 is a wasteful number, since it uses less digits than its factorization.

40312720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72007 (or 72001 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 40312720 is about 6349.2298745596. The cubic root of 40312720 is about 342.8841162641.

The spelling of 40312720 in words is "forty million, three hundred twelve thousand, seven hundred twenty".