78772380 has 24 divisors (see below), whose sum is σ = 220562832. Its totient is φ = 21005952.

The previous prime is 78772367. The next prime is 78772391. The reversal of 78772380 is 8327787.

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, 656377 + ... + 656496.

It is an arithmetic number, because the mean of its divisors is an integer number (9190118).

Almost surely, 2^78772380 is an apocalyptic number.

It is an amenable number.

78772380 is an abundant number, since it is smaller than the sum of its proper divisors (141790452).

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

78772380 is a wasteful number, since it uses less digits than its factorization.

78772380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312885 (or 1312883 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 78772380 is about 8875.3805552213. The cubic root of 78772380 is about 428.6715445472.

The spelling of 78772380 in words is "seventy-eight million, seven hundred seventy-two thousand, three hundred eighty".