78812456 has 32 divisors (see below), whose sum is σ = 156554400. Its totient is φ = 37091520.

The previous prime is 78812443. The next prime is 78812497. The reversal of 78812456 is 65421887.

It is a super-2 number, since 2×78812456² = 12422806441503872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23186 + ... + 26366.

It is an arithmetic number, because the mean of its divisors is an integer number (4892325).

Almost surely, 2^78812456 is an apocalyptic number.

78812456 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78812456 is a deficient number, since it is larger than the sum of its proper divisors (77741944).

78812456 is a wasteful number, since it uses less digits than its factorization.

78812456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369 (or 3365 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 78812456 is about 8877.6379741461. The cubic root of 78812456 is about 428.7442287725.

The spelling of 78812456 in words is "seventy-eight million, eight hundred twelve thousand, four hundred fifty-six".