78225568 has 24 divisors (see below), whose sum is σ = 163066932. Its totient is φ = 36811776.

The previous prime is 78225547. The next prime is 78225569. The reversal of 78225568 is 86552287.

It can be written as a sum of positive squares in 2 ways, for example, as 75829264 + 2396304 = 8708^2 + 1548^2 .

It is a super-2 number, since 2×78225568² = 12238478977845248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78225569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71355 + ... + 72442.

Almost surely, 2^78225568 is an apocalyptic number.

It is an amenable number.

78225568 is an abundant number, since it is smaller than the sum of its proper divisors (84841364).

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

78225568 is a wasteful number, since it uses less digits than its factorization.

78225568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143824 (or 143816 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 78225568 is about 8844.5219203753. The cubic root of 78225568 is about 427.6773414677.

The spelling of 78225568 in words is "seventy-eight million, two hundred twenty-five thousand, five hundred sixty-eight".