78492946 has 16 divisors (see below), whose sum is σ = 134890560. Its totient is φ = 33557040.

The previous prime is 78492929. The next prime is 78492959. The reversal of 78492946 is 64929487.

It is a super-2 number, since 2×78492946² = 12322285143517832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78492946.

It is an unprimeable number.

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, 825 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (8430660).

Almost surely, 2^78492946 is an apocalyptic number.

78492946 is a deficient number, since it is larger than the sum of its proper divisors (56397614).

78492946 is a wasteful number, since it uses less digits than its factorization.

78492946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13809.

The product of its digits is 870912, while the sum is 49.

The square root of 78492946 is about 8859.6244841415. The cubic root of 78492946 is about 428.1640598813.

The spelling of 78492946 in words is "seventy-eight million, four hundred ninety-two thousand, nine hundred forty-six".