77622320 has 20 divisors (see below), whose sum is σ = 180472080. Its totient is φ = 31048896.

The previous prime is 77622301. The next prime is 77622359. The reversal of 77622320 is 2322677.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485060 + ... + 485219.

It is an arithmetic number, because the mean of its divisors is an integer number (9023604).

Almost surely, 2^77622320 is an apocalyptic number.

It is an amenable number.

77622320 is an abundant number, since it is smaller than the sum of its proper divisors (102849760).

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

77622320 is a wasteful number, since it uses less digits than its factorization.

77622320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970292 (or 970286 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 77622320 is about 8810.3530008735. The cubic root of 77622320 is about 426.5751377016.

Adding to 77622320 its reverse (2322677), we get a palindrome (79944997).

The spelling of 77622320 in words is "seventy-seven million, six hundred twenty-two thousand, three hundred twenty".