78256244 has 12 divisors (see below), whose sum is σ = 149398368. Its totient is φ = 35571000.

The previous prime is 78256163. The next prime is 78256247. The reversal of 78256244 is 44265287.

It is a super-2 number, since 2×78256244² = 12248079449975072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78256198 and 78256207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78256247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 889232 + ... + 889319.

It is an arithmetic number, because the mean of its divisors is an integer number (12449864).

Almost surely, 2^78256244 is an apocalyptic number.

It is an amenable number.

78256244 is a deficient number, since it is larger than the sum of its proper divisors (71142124).

78256244 is a wasteful number, since it uses less digits than its factorization.

78256244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778566 (or 1778564 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 78256244 is about 8846.2559311835. The cubic root of 78256244 is about 427.7332384330.

The spelling of 78256244 in words is "seventy-eight million, two hundred fifty-six thousand, two hundred forty-four".