77204080 has 40 divisors (see below), whose sum is σ = 183327552. Its totient is φ = 30223104.

The previous prime is 77204041. The next prime is 77204081. The reversal of 77204080 is 8040277.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77204081) 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, 6507 + ... + 14026.

Almost surely, 2^77204080 is an apocalyptic number.

It is an amenable number.

77204080 is an abundant number, since it is smaller than the sum of its proper divisors (106123472).

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

77204080 is a wasteful number, since it uses less digits than its factorization.

77204080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20593 (or 20587 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 77204080 is about 8786.5852297693. The cubic root of 77204080 is about 425.8076085408.

The spelling of 77204080 in words is "seventy-seven million, two hundred four thousand, eighty".