78756380 has 12 divisors (see below), whose sum is σ = 165388440. Its totient is φ = 31502544.

The previous prime is 78756361. The next prime is 78756407. The reversal of 78756380 is 8365787.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968890 + ... + 1968929.

It is an arithmetic number, because the mean of its divisors is an integer number (13782370).

Almost surely, 2^78756380 is an apocalyptic number.

It is an amenable number.

78756380 is an abundant number, since it is smaller than the sum of its proper divisors (86632060).

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

78756380 is a wasteful number, since it uses less digits than its factorization.

78756380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937828 (or 3937826 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 78756380 is about 8874.4791396453. The cubic root of 78756380 is about 428.6425191065.

The spelling of 78756380 in words is "seventy-eight million, seven hundred fifty-six thousand, three hundred eighty".