77222760 has 32 divisors (see below), whose sum is σ = 231668640. Its totient is φ = 20592704.

The previous prime is 77222741. The next prime is 77222773. The reversal of 77222760 is 6722277.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321642 + ... + 321881.

It is an arithmetic number, because the mean of its divisors is an integer number (7239645).

Almost surely, 2^77222760 is an apocalyptic number.

It is an amenable number.

77222760 is an abundant number, since it is smaller than the sum of its proper divisors (154445880).

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

77222760 is a wasteful number, since it uses less digits than its factorization.

77222760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643537 (or 643533 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 77222760 is about 8787.6481495335. The cubic root of 77222760 is about 425.8419480243.

It can be divided in two parts, 772 and 22760, that added together give a palindrome (23532).

The spelling of 77222760 in words is "seventy-seven million, two hundred twenty-two thousand, seven hundred sixty".