78490916 has 24 divisors (see below), whose sum is σ = 157213056. Its totient is φ = 33589440.

The previous prime is 78490913. The next prime is 78490931. The reversal of 78490916 is 61909487.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78490913) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22361 + ... + 25631.

It is an arithmetic number, because the mean of its divisors is an integer number (6550544).

Almost surely, 2^78490916 is an apocalyptic number.

It is an amenable number.

78490916 is an abundant number, since it is smaller than the sum of its proper divisors (78722140).

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

78490916 is a wasteful number, since it uses less digits than its factorization.

78490916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 78490916 is about 8859.5099187258. The cubic root of 78490916 is about 428.1603687618.

The spelling of 78490916 in words is "seventy-eight million, four hundred ninety thousand, nine hundred sixteen".