40720512 has 64 divisors (see below), whose sum is σ = 123624000. Its totient is φ = 11633664.

The previous prime is 40720507. The next prime is 40720513. The reversal of 40720512 is 21502704.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40720513) 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, 4887 + ... + 10262.

It is an arithmetic number, because the mean of its divisors is an integer number (1931625).

Almost surely, 2^40720512 is an apocalyptic number.

40720512 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

40720512 is an abundant number, since it is smaller than the sum of its proper divisors (82903488).

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

40720512 is a wasteful number, since it uses less digits than its factorization.

40720512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15173 (or 15161 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 40720512 is about 6381.2625709964. The cubic root of 40720512 is about 344.0364122264.

The spelling of 40720512 in words is "forty million, seven hundred twenty thousand, five hundred twelve".