772808620 has 24 divisors (see below), whose sum is σ = 1623754944. Its totient is φ = 308960256.

The previous prime is 772808611. The next prime is 772808623. The reversal of 772808620 is 26808277.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (772808623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33117 + ... + 51403.

It is an arithmetic number, because the mean of its divisors is an integer number (67656456).

Almost surely, 2^772808620 is an apocalyptic number.

It is an amenable number.

772808620 is an abundant number, since it is smaller than the sum of its proper divisors (850946324).

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

772808620 is a wasteful number, since it uses less digits than its factorization.

772808620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20409 (or 20407 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 772808620 is about 27799.4356057816. The cubic root of 772808620 is about 917.6787021339.

The spelling of 772808620 in words is "seven hundred seventy-two million, eight hundred eight thousand, six hundred twenty".