77975982 has 24 divisors (see below), whose sum is σ = 193083696. Its totient is φ = 22278816.

The previous prime is 77975969. The next prime is 77976001. The reversal of 77975982 is 28957977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309303 + ... + 309554.

It is an arithmetic number, because the mean of its divisors is an integer number (8045154).

Almost surely, 2^77975982 is an apocalyptic number.

77975982 is an abundant number, since it is smaller than the sum of its proper divisors (115107714).

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

77975982 is a wasteful number, since it uses less digits than its factorization.

77975982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618872 (or 618869 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 77975982 is about 8830.4010101467. The cubic root of 77975982 is about 427.2220086608. Note that the first 3 decimals are identical.

The spelling of 77975982 in words is "seventy-seven million, nine hundred seventy-five thousand, nine hundred eighty-two".