77520996 has 144 divisors (see below), whose sum is σ = 239290240. Its totient is φ = 21254400.

The previous prime is 77520991. The next prime is 77520997. The reversal of 77520996 is 69902577.

It is not an unprimeable number, because it can be changed into a prime (77520991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1270806 + ... + 1270866.

Almost surely, 2^77520996 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 77520996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119645120).

77520996 is an abundant number, since it is smaller than the sum of its proper divisors (161769244).

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

77520996 is a wasteful number, since it uses less digits than its factorization.

77520996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 77520996 is about 8804.6008427413. The cubic root of 77520996 is about 426.3894474706.

The spelling of 77520996 in words is "seventy-seven million, five hundred twenty thousand, nine hundred ninety-six".