65428720 has 60 divisors (see below), whose sum is σ = 176968584. Its totient is φ = 22431360.

The previous prime is 65428703. The next prime is 65428771. The reversal of 65428720 is 2782456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4426 + ... + 12265.

Almost surely, 2^65428720 is an apocalyptic number.

It is an amenable number.

65428720 is an abundant number, since it is smaller than the sum of its proper divisors (111539864).

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

65428720 is a wasteful number, since it uses less digits than its factorization.

65428720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16718 (or 16705 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 65428720 is about 8088.8021362869. The cubic root of 65428720 is about 402.9546217893.

The spelling of 65428720 in words is "sixty-five million, four hundred twenty-eight thousand, seven hundred twenty".