78780764 has 24 divisors (see below), whose sum is σ = 145958400. Its totient is φ = 37102320.

The previous prime is 78780763. The next prime is 78780769. The reversal of 78780764 is 46708787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78780763) 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, 10709 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (6081600).

Almost surely, 2^78780764 is an apocalyptic number.

It is an amenable number.

78780764 is a deficient number, since it is larger than the sum of its proper divisors (67177636).

78780764 is a wasteful number, since it uses less digits than its factorization.

78780764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993 (or 5991 counting only the distinct ones).

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

The square root of 78780764 is about 8875.8528604298. The cubic root of 78780764 is about 428.6867523088.

The spelling of 78780764 in words is "seventy-eight million, seven hundred eighty thousand, seven hundred sixty-four".