78737980 has 12 divisors (see below), whose sum is σ = 165349800. Its totient is φ = 31495184.

The previous prime is 78737977. The next prime is 78738013. The reversal of 78737980 is 8973787.

It is a happy number.

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, 1968430 + ... + 1968469.

It is an arithmetic number, because the mean of its divisors is an integer number (13779150).

Almost surely, 2^78737980 is an apocalyptic number.

It is an amenable number.

78737980 is an abundant number, since it is smaller than the sum of its proper divisors (86611820).

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

78737980 is a wasteful number, since it uses less digits than its factorization.

78737980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936908 (or 3936906 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 78737980 is about 8873.4423985283. The cubic root of 78737980 is about 428.6091349893.

The spelling of 78737980 in words is "seventy-eight million, seven hundred thirty-seven thousand, nine hundred eighty".