77457894 has 12 divisors (see below), whose sum is σ = 154958916. Its totient is φ = 25812112.

The previous prime is 77457893. The next prime is 77457901. The reversal of 77457894 is 49875477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77457893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19762 + ... + 23354.

It is an arithmetic number, because the mean of its divisors is an integer number (12913243).

Almost surely, 2^77457894 is an apocalyptic number.

77457894 is an abundant number, since it is smaller than the sum of its proper divisors (77501022).

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

77457894 is an frugal number, since it uses more digits than its factorization.

77457894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191 (or 3598 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 51.

The square root of 77457894 is about 8801.0166458200. The cubic root of 77457894 is about 426.2737225612.

The spelling of 77457894 in words is "seventy-seven million, four hundred fifty-seven thousand, eight hundred ninety-four".