72640710 has 24 divisors (see below), whose sum is σ = 188866080. Its totient is φ = 19370832.

The previous prime is 72640703. The next prime is 72640747. The reversal of 72640710 is 1704627.

72640710 is a `hidden beast` number, since 7 + 2 + 640 + 7 + 10 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 403470 + ... + 403649.

It is an arithmetic number, because the mean of its divisors is an integer number (7869420).

Almost surely, 2^72640710 is an apocalyptic number.

72640710 is an abundant number, since it is smaller than the sum of its proper divisors (116225370).

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

72640710 is a wasteful number, since it uses less digits than its factorization.

72640710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807132 (or 807129 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 72640710 is about 8522.9519534021. The cubic root of 72640710 is about 417.2471319464.

The spelling of 72640710 in words is "seventy-two million, six hundred forty thousand, seven hundred ten".