772819980 has 48 divisors (see below), whose sum is σ = 2199380064. Its totient is φ = 202705920.

The previous prime is 772819979. The next prime is 772819981. The reversal of 772819980 is 89918277.

It is an interprime number because it is at equal distance from previous prime (772819979) and next prime (772819981).

It is not an unprimeable number, because it can be changed into a prime (772819981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101917 + ... + 109236.

It is an arithmetic number, because the mean of its divisors is an integer number (45820418).

Almost surely, 2^772819980 is an apocalyptic number.

It is an amenable number.

772819980 is an abundant number, since it is smaller than the sum of its proper divisors (1426560084).

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

772819980 is a wasteful number, since it uses less digits than its factorization.

772819980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211226 (or 211224 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 772819980 is about 27799.6399257257. The cubic root of 772819980 is about 917.6831986241.

The spelling of 772819980 in words is "seven hundred seventy-two million, eight hundred nineteen thousand, nine hundred eighty".