78944780 has 24 divisors (see below), whose sum is σ = 167650560. Its totient is φ = 31222400.

The previous prime is 78944759. The next prime is 78944783. The reversal of 78944780 is 8744987.

It is not an unprimeable number, because it can be changed into a prime (78944783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20396 + ... + 23955.

It is an arithmetic number, because the mean of its divisors is an integer number (6985440).

Almost surely, 2^78944780 is an apocalyptic number.

It is an amenable number.

78944780 is an abundant number, since it is smaller than the sum of its proper divisors (88705780).

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

78944780 is a wasteful number, since it uses less digits than its factorization.

78944780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44449 (or 44447 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78944780 is about 8885.0875066034. The cubic root of 78944780 is about 428.9840446284.

The spelling of 78944780 in words is "seventy-eight million, nine hundred forty-four thousand, seven hundred eighty".