77942472 has 16 divisors (see below), whose sum is σ = 194856240. Its totient is φ = 25980816.

The previous prime is 77942437. The next prime is 77942539. The reversal of 77942472 is 27424977.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623778 + ... + 1623825.

It is an arithmetic number, because the mean of its divisors is an integer number (12178515).

Almost surely, 2^77942472 is an apocalyptic number.

It is an amenable number.

77942472 is an abundant number, since it is smaller than the sum of its proper divisors (116913768).

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

77942472 is a wasteful number, since it uses less digits than its factorization.

77942472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247612 (or 3247608 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 77942472 is about 8828.5033839264. The cubic root of 77942472 is about 427.1608006648.

The spelling of 77942472 in words is "seventy-seven million, nine hundred forty-two thousand, four hundred seventy-two".