79944100 has 18 divisors (see below), whose sum is σ = 173478914. Its totient is φ = 31977600.

The previous prime is 79944061. The next prime is 79944101. The reversal of 79944100 is 144997.

It can be written as a sum of positive squares in 3 ways, for example, as 627264 + 79316836 = 792^2 + 8906^2 .

It is not an unprimeable number, because it can be changed into a prime (79944101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399621 + ... + 399820.

Almost surely, 2^79944100 is an apocalyptic number.

It is an amenable number.

79944100 is an abundant number, since it is smaller than the sum of its proper divisors (93534814).

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

79944100 is a wasteful number, since it uses less digits than its factorization.

79944100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799455 (or 799448 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 79944100 is about 8941.1464589280. The cubic root of 79944100 is about 430.7865538723.

The spelling of 79944100 in words is "seventy-nine million, nine hundred forty-four thousand, one hundred".