78764780 has 24 divisors (see below), whose sum is σ = 165745440. Its totient is φ = 31441280.

The previous prime is 78764753. The next prime is 78764789. The reversal of 78764780 is 8746787.

It is not an unprimeable number, because it can be changed into a prime (78764789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6641 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (6906060).

Almost surely, 2^78764780 is an apocalyptic number.

It is an amenable number.

78764780 is an abundant number, since it is smaller than the sum of its proper divisors (86980660).

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

78764780 is a wasteful number, since it uses less digits than its factorization.

78764780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089 (or 8087 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 78764780 is about 8874.9523942385. The cubic root of 78764780 is about 428.6577579530.

The spelling of 78764780 in words is "seventy-eight million, seven hundred sixty-four thousand, seven hundred eighty".