77815230 has 16 divisors (see below), whose sum is σ = 186756624. Its totient is φ = 20750720.

The previous prime is 77815229. The next prime is 77815247. The reversal of 77815230 is 3251877.

It is a junction number, because it is equal to n+sod(n) for n = 77815191 and 77815200.

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, 1296891 + ... + 1296950.

It is an arithmetic number, because the mean of its divisors is an integer number (11672289).

Almost surely, 2^77815230 is an apocalyptic number.

77815230 is an abundant number, since it is smaller than the sum of its proper divisors (108941394).

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

77815230 is a wasteful number, since it uses less digits than its factorization.

77815230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593851.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 77815230 is about 8821.2941227464. The cubic root of 77815230 is about 426.9282257188.

The spelling of 77815230 in words is "seventy-seven million, eight hundred fifteen thousand, two hundred thirty".