78225456 has 80 divisors (see below), whose sum is σ = 208674144. Its totient is φ = 25239552.

The previous prime is 78225443. The next prime is 78225481. The reversal of 78225456 is 65452287.

It is a super-2 number, since 2×78225456² = 12238443932815872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246610 + ... + 246926.

Almost surely, 2^78225456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78225456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104337072).

78225456 is an abundant number, since it is smaller than the sum of its proper divisors (130448688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78225456 is a wasteful number, since it uses less digits than its factorization.

78225456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 78225456 is about 8844.5155887703. The cubic root of 78225456 is about 427.6771373576.

The spelling of 78225456 in words is "seventy-eight million, two hundred twenty-five thousand, four hundred fifty-six".