77226688 has 56 divisors (see below), whose sum is σ = 191073024. Its totient is φ = 30086400.

The previous prime is 77226683. The next prime is 77226691. The reversal of 77226688 is 88662277.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×77226688² = 11927922678898688, which contains 22 as substring.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (77226683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2908 + ... + 12763.

Almost surely, 2^77226688 is an apocalyptic number.

It is an amenable number.

77226688 is an abundant number, since it is smaller than the sum of its proper divisors (113846336).

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

77226688 is a wasteful number, since it uses less digits than its factorization.

77226688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701 (or 15691 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 77226688 is about 8787.8716422124. The cubic root of 77226688 is about 425.8491681703.

The spelling of 77226688 in words is "seventy-seven million, two hundred twenty-six thousand, six hundred eighty-eight".