77930840 has 32 divisors (see below), whose sum is σ = 188833680. Its totient is φ = 28774272.

The previous prime is 77930833. The next prime is 77930851. The reversal of 77930840 is 4803977.

It is a junction number, because it is equal to n+sod(n) for n = 77930794 and 77930803.

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, 74414 + ... + 75453.

Almost surely, 2^77930840 is an apocalyptic number.

It is an amenable number.

77930840 is an abundant number, since it is smaller than the sum of its proper divisors (110902840).

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

77930840 is a wasteful number, since it uses less digits than its factorization.

77930840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149891 (or 149887 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 77930840 is about 8827.8445840420. The cubic root of 77930840 is about 427.1395500274.

The spelling of 77930840 in words is "seventy-seven million, nine hundred thirty thousand, eight hundred forty".