78987044 has 24 divisors (see below), whose sum is σ = 143256960. Its totient is φ = 38080224.

The previous prime is 78987031. The next prime is 78987061. The reversal of 78987044 is 44078987.

It is a self number, because there is not a number n which added to its sum of digits gives 78987044.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10682 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (5969040).

Almost surely, 2^78987044 is an apocalyptic number.

It is an amenable number.

78987044 is a deficient number, since it is larger than the sum of its proper divisors (64269916).

78987044 is a wasteful number, since it uses less digits than its factorization.

78987044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5939 (or 5937 counting only the distinct ones).

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

The square root of 78987044 is about 8887.4655554888. The cubic root of 78987044 is about 429.0605848259.

The spelling of 78987044 in words is "seventy-eight million, nine hundred eighty-seven thousand, forty-four".