78226704 has 30 divisors (see below), whose sum is σ = 218926526. Its totient is φ = 26075520.

The previous prime is 78226699. The next prime is 78226711. The reversal of 78226704 is 40762287.

It can be written as a sum of positive squares in only one way, i.e., 65610000 + 12616704 = 8100^2 + 3552^2 .

It is a super-2 number, since 2×78226704² = 12238834437407232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271477 + ... + 271764.

Almost surely, 2^78226704 is an apocalyptic number.

It is an amenable number.

78226704 is an abundant number, since it is smaller than the sum of its proper divisors (140699822).

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

78226704 is a wasteful number, since it uses less digits than its factorization.

78226704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543255 (or 543246 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 78226704 is about 8844.5861406852. The cubic root of 78226704 is about 427.6794117162.

The spelling of 78226704 in words is "seventy-eight million, two hundred twenty-six thousand, seven hundred four".