77942648 has 32 divisors (see below), whose sum is σ = 170177760. Its totient is φ = 32772480.

The previous prime is 77942639. The next prime is 77942687. The reversal of 77942648 is 84624977.

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, 10163 + ... + 16098.

It is an arithmetic number, because the mean of its divisors is an integer number (5318055).

Almost surely, 2^77942648 is an apocalyptic number.

It is an amenable number.

77942648 is an abundant number, since it is smaller than the sum of its proper divisors (92235112).

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

77942648 is a wasteful number, since it uses less digits than its factorization.

77942648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26327 (or 26323 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 77942648 is about 8828.5133516351. The cubic root of 77942648 is about 427.1611221850.

The spelling of 77942648 in words is "seventy-seven million, nine hundred forty-two thousand, six hundred forty-eight".