78558944 has 36 divisors (see below), whose sum is σ = 157194072. Its totient is φ = 38646720.

The previous prime is 78558937. The next prime is 78558947. The reversal of 78558944 is 44985587.

Its product of digits (1612800) is a multiple of the sum of its prime divisors (560).

It is a junction number, because it is equal to n+sod(n) for n = 78558892 and 78558901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78558947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161069 + ... + 161555.

It is an arithmetic number, because the mean of its divisors is an integer number (4366502).

Almost surely, 2^78558944 is an apocalyptic number.

It is an amenable number.

78558944 is an abundant number, since it is smaller than the sum of its proper divisors (78635128).

78558944 is an equidigital number, since it uses as much as digits as its factorization.

78558944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 560 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 78558944 is about 8863.3483514979. The cubic root of 78558944 is about 428.2840284342.

The spelling of 78558944 in words is "seventy-eight million, five hundred fifty-eight thousand, nine hundred forty-four".