77425980 has 24 divisors (see below), whose sum is σ = 216792912. Its totient is φ = 20646912.

The previous prime is 77425979. The next prime is 77425987. The reversal of 77425980 is 8952477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77425987) 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, 645157 + ... + 645276.

It is an arithmetic number, because the mean of its divisors is an integer number (9033038).

Almost surely, 2^77425980 is an apocalyptic number.

It is an amenable number.

77425980 is an abundant number, since it is smaller than the sum of its proper divisors (139366932).

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

77425980 is a wasteful number, since it uses less digits than its factorization.

77425980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290445 (or 1290443 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 77425980 is about 8799.2033730333. The cubic root of 77425980 is about 426.2151704556.

The spelling of 77425980 in words is "seventy-seven million, four hundred twenty-five thousand, nine hundred eighty".