77670740 has 24 divisors (see below), whose sum is σ = 186410112. Its totient is φ = 26629920.

The previous prime is 77670737. The next prime is 77670757. The reversal of 77670740 is 4707677.

It is a junction number, because it is equal to n+sod(n) for n = 77670694 and 77670703.

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, 277256 + ... + 277535.

It is an arithmetic number, because the mean of its divisors is an integer number (7767088).

Almost surely, 2^77670740 is an apocalyptic number.

77670740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77670740 is an abundant number, since it is smaller than the sum of its proper divisors (108739372).

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

77670740 is a wasteful number, since it uses less digits than its factorization.

77670740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554807 (or 554805 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 77670740 is about 8813.1004759959. The cubic root of 77670740 is about 426.6638169840.

The spelling of 77670740 in words is "seventy-seven million, six hundred seventy thousand, seven hundred forty".