77322996 has 18 divisors (see below), whose sum is σ = 195455442. Its totient is φ = 25774320.

The previous prime is 77322991. The next prime is 77323003. The reversal of 77322996 is 69922377.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 15920100 = 7836^2 + 3990^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77322991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1073895 + ... + 1073966.

Almost surely, 2^77322996 is an apocalyptic number.

It is an amenable number.

77322996 is an abundant number, since it is smaller than the sum of its proper divisors (118132446).

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

77322996 is a wasteful number, since it uses less digits than its factorization.

77322996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147871 (or 2147866 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 77322996 is about 8793.3495324592. The cubic root of 77322996 is about 426.0261175550.

The spelling of 77322996 in words is "seventy-seven million, three hundred twenty-two thousand, nine hundred ninety-six".