78499788 has 24 divisors (see below), whose sum is σ = 184229808. Its totient is φ = 26014656.

The previous prime is 78499763. The next prime is 78499793. The reversal of 78499788 is 88799487.

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, 16831 + ... + 20982.

It is an arithmetic number, because the mean of its divisors is an integer number (7676242).

Almost surely, 2^78499788 is an apocalyptic number.

It is an amenable number.

78499788 is an abundant number, since it is smaller than the sum of its proper divisors (105730020).

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

78499788 is a wasteful number, since it uses less digits than its factorization.

78499788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37993 (or 37991 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 60.

The square root of 78499788 is about 8860.0106094745. The cubic root of 78499788 is about 428.1765001218.

The spelling of 78499788 in words is "seventy-eight million, four hundred ninety-nine thousand, seven hundred eighty-eight".