78320476 has 12 divisors (see below), whose sum is σ = 147604072. Its totient is φ = 36147888.

The previous prime is 78320461. The next prime is 78320563. The reversal of 78320476 is 67402387.

It is a super-2 number, since 2×78320476² = 12268193921733152, 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 in 3 ways as a sum of consecutive naturals, for example, 753030 + ... + 753133.

Almost surely, 2^78320476 is an apocalyptic number.

It is an amenable number.

78320476 is a deficient number, since it is larger than the sum of its proper divisors (69283596).

78320476 is a wasteful number, since it uses less digits than its factorization.

78320476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506180 (or 1506178 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 78320476 is about 8849.8856489787. The cubic root of 78320476 is about 427.8502329225.

The spelling of 78320476 in words is "seventy-eight million, three hundred twenty thousand, four hundred seventy-six".