77620512 has 48 divisors (see below), whose sum is σ = 204240960. Its totient is φ = 25811712.

The previous prime is 77620511. The next prime is 77620523. The reversal of 77620512 is 21502677.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 77620512.

It is not an unprimeable number, because it can be changed into a prime (77620511) 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, 58189 + ... + 59507.

It is an arithmetic number, because the mean of its divisors is an integer number (4255020).

Almost surely, 2^77620512 is an apocalyptic number.

It is an amenable number.

77620512 is an abundant number, since it is smaller than the sum of its proper divisors (126620448).

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

77620512 is a wasteful number, since it uses less digits than its factorization.

77620512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 77620512 is about 8810.2503937175. The cubic root of 77620512 is about 426.5718257082.

The spelling of 77620512 in words is "seventy-seven million, six hundred twenty thousand, five hundred twelve".