77897492 has 48 divisors (see below), whose sum is σ = 148599360. Its totient is φ = 35612928.

The previous prime is 77897453. The next prime is 77897503. The reversal of 77897492 is 29479877.

It is a Harshad number since it is a multiple of its sum of digits (53).

Its product of digits (1778112) is a multiple of the sum of its prime factors (392).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334208 + ... + 334440.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^77897492 is an apocalyptic number.

It is an amenable number.

77897492 is a deficient number, since it is larger than the sum of its proper divisors (70701868).

77897492 is a wasteful number, since it uses less digits than its factorization.

77897492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 390 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 53.

The square root of 77897492 is about 8825.9555856576. The cubic root of 77897492 is about 427.0786144509.

The spelling of 77897492 in words is "seventy-seven million, eight hundred ninety-seven thousand, four hundred ninety-two".