65039980 has 12 divisors (see below), whose sum is σ = 136584000. Its totient is φ = 26015984.

The previous prime is 65039971. The next prime is 65039999. The reversal of 65039980 is 8993056.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625980 + ... + 1626019.

It is an arithmetic number, because the mean of its divisors is an integer number (11382000).

Almost surely, 2^65039980 is an apocalyptic number.

It is an amenable number.

65039980 is an abundant number, since it is smaller than the sum of its proper divisors (71544020).

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

65039980 is a wasteful number, since it uses less digits than its factorization.

65039980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252008 (or 3252006 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 65039980 is about 8064.7368214964. The cubic root of 65039980 is about 402.1549941510.

The spelling of 65039980 in words is "sixty-five million, thirty-nine thousand, nine hundred eighty".