78780512 has 12 divisors (see below), whose sum is σ = 155099196. Its totient is φ = 39390240.

The previous prime is 78780509. The next prime is 78780539. The reversal of 78780512 is 21508787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1230914 + ... + 1230977.

It is an arithmetic number, because the mean of its divisors is an integer number (12924933).

Almost surely, 2^78780512 is an apocalyptic number.

It is an amenable number.

78780512 is a deficient number, since it is larger than the sum of its proper divisors (76318684).

78780512 is a wasteful number, since it uses less digits than its factorization.

78780512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461901 (or 2461893 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 78780512 is about 8875.8386645995. The cubic root of 78780512 is about 428.6862952210.

The spelling of 78780512 in words is "seventy-eight million, seven hundred eighty thousand, five hundred twelve".