77287944 has 32 divisors (see below), whose sum is σ = 193453920. Its totient is φ = 25731456.

The previous prime is 77287943. The next prime is 77287961. The reversal of 77287944 is 44978277.

It is a junction number, because it is equal to n+sod(n) for n = 77287893 and 77287902.

It is not an unprimeable number, because it can be changed into a prime (77287943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27132 + ... + 29844.

It is an arithmetic number, because the mean of its divisors is an integer number (6045435).

Almost surely, 2^77287944 is an apocalyptic number.

It is an amenable number.

77287944 is an abundant number, since it is smaller than the sum of its proper divisors (116165976).

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

77287944 is a wasteful number, since it uses less digits than its factorization.

77287944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909 (or 3905 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 77287944 is about 8791.3562093684. The cubic root of 77287944 is about 425.9617325497.

The spelling of 77287944 in words is "seventy-seven million, two hundred eighty-seven thousand, nine hundred forty-four".