65728980 has 72 divisors (see below), whose sum is σ = 209882400. Its totient is φ = 16604352.

The previous prime is 65728973. The next prime is 65729011. The reversal of 65728980 is 8982756.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6190 + ... + 13029.

Almost surely, 2^65728980 is an apocalyptic number.

65728980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65728980 is an abundant number, since it is smaller than the sum of its proper divisors (144153420).

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

65728980 is a wasteful number, since it uses less digits than its factorization.

65728980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19253 (or 19248 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 65728980 is about 8107.3411177771. The cubic root of 65728980 is about 403.5700831359.

The spelling of 65728980 in words is "sixty-five million, seven hundred twenty-eight thousand, nine hundred eighty".