78263974 has 4 divisors (see below), whose sum is σ = 117395964. Its totient is φ = 39131986.

The previous prime is 78263947. The next prime is 78263981. The reversal of 78263974 is 47936287.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78263974² = 12250499252545352, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 19565992 + ... + 19565995.

It is an arithmetic number, because the mean of its divisors is an integer number (29348991).

Almost surely, 2^78263974 is an apocalyptic number.

78263974 is a deficient number, since it is larger than the sum of its proper divisors (39131990).

78263974 is a wasteful number, since it uses less digits than its factorization.

78263974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39131989.

The product of its digits is 508032, while the sum is 46.

The square root of 78263974 is about 8846.6928283964. The cubic root of 78263974 is about 427.7473215225.

The spelling of 78263974 in words is "seventy-eight million, two hundred sixty-three thousand, nine hundred seventy-four".