77746980 has 24 divisors (see below), whose sum is σ = 217691712. Its totient is φ = 20732512.

The previous prime is 77746973. The next prime is 77747003. The reversal of 77746980 is 8964777.

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, 647832 + ... + 647951.

It is an arithmetic number, because the mean of its divisors is an integer number (9070488).

Almost surely, 2^77746980 is an apocalyptic number.

It is an amenable number.

77746980 is an abundant number, since it is smaller than the sum of its proper divisors (139944732).

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

77746980 is a wasteful number, since it uses less digits than its factorization.

77746980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295795 (or 1295793 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 77746980 is about 8817.4247941221. The cubic root of 77746980 is about 426.8033728064.

The spelling of 77746980 in words is "seventy-seven million, seven hundred forty-six thousand, nine hundred eighty".