772466640 has 80 divisors (see below), whose sum is σ = 2612350656. Its totient is φ = 187264000.

The previous prime is 772466593. The next prime is 772466671. The reversal of 772466640 is 46664277.

772466640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 772466592 and 772466601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143661 + ... + 148940.

Almost surely, 2^772466640 is an apocalyptic number.

It is an amenable number.

772466640 is an abundant number, since it is smaller than the sum of its proper divisors (1839884016).

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

772466640 is a wasteful number, since it uses less digits than its factorization.

772466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292628 (or 292622 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 772466640 is about 27793.2840808710. The cubic root of 772466640 is about 917.5433197305.

The spelling of 772466640 in words is "seven hundred seventy-two million, four hundred sixty-six thousand, six hundred forty".