765728240 has 40 divisors (see below), whose sum is σ = 1781524368. Its totient is φ = 306083840.

The previous prime is 765728239. The next prime is 765728279. The reversal of 765728240 is 42827567.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179735 + ... + 183945.

Almost surely, 2^765728240 is an apocalyptic number.

It is an amenable number.

765728240 is an abundant number, since it is smaller than the sum of its proper divisors (1015796128).

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

765728240 is a wasteful number, since it uses less digits than its factorization.

765728240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 765728240 is about 27671.7950267054. The cubic root of 765728240 is about 914.8675453008.

The spelling of 765728240 in words is "seven hundred sixty-five million, seven hundred twenty-eight thousand, two hundred forty".