77020472 has 32 divisors (see below), whose sum is σ = 153342720. Its totient is φ = 36142080.

The previous prime is 77020459. The next prime is 77020481. The reversal of 77020472 is 27402077.

It is a congruent number.

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, 70313 + ... + 71399.

It is an arithmetic number, because the mean of its divisors is an integer number (4791960).

Almost surely, 2^77020472 is an apocalyptic number.

It is an amenable number.

77020472 is a deficient number, since it is larger than the sum of its proper divisors (76322248).

77020472 is a wasteful number, since it uses less digits than its factorization.

77020472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 77020472 is about 8776.1308103287. The cubic root of 77020472 is about 425.4697863986.

The spelling of 77020472 in words is "seventy-seven million, twenty thousand, four hundred seventy-two".