77222464 has 56 divisors (see below), whose sum is σ = 168249600. Its totient is φ = 34874880.

The previous prime is 77222461. The next prime is 77222501. The reversal of 77222464 is 46422277.

It is not an unprimeable number, because it can be changed into a prime (77222461) 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, 160977 + ... + 161455.

Almost surely, 2^77222464 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 77222464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84124800).

77222464 is an abundant number, since it is smaller than the sum of its proper divisors (91027136).

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

77222464 is a wasteful number, since it uses less digits than its factorization.

77222464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 721 counting only the distinct ones).

The product of its digits is 37632, while the sum is 34.

The square root of 77222464 is about 8787.6313076961. The cubic root of 77222464 is about 425.8414039300.

The spelling of 77222464 in words is "seventy-seven million, two hundred twenty-two thousand, four hundred sixty-four".