77447994 has 16 divisors (see below), whose sum is σ = 166811232. Its totient is φ = 23830128.

The previous prime is 77447927. The next prime is 77448071. The reversal of 77447994 is 49974477.

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, 496384 + ... + 496539.

It is an arithmetic number, because the mean of its divisors is an integer number (10425702).

Almost surely, 2^77447994 is an apocalyptic number.

77447994 is an abundant number, since it is smaller than the sum of its proper divisors (89363238).

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

77447994 is a wasteful number, since it uses less digits than its factorization.

77447994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992941.

The product of its digits is 1778112, while the sum is 51.

The square root of 77447994 is about 8800.4541928244. The cubic root of 77447994 is about 426.2555609105.

The spelling of 77447994 in words is "seventy-seven million, four hundred forty-seven thousand, nine hundred ninety-four".