79998100 has 144 divisors (see below), whose sum is σ = 218736000. Its totient is φ = 24721920.

The previous prime is 79998091. The next prime is 79998101. The reversal of 79998100 is 189997.

It is a super-2 number, since 2×79998100² = 12799392007220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79998101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 536826 + ... + 536974.

It is an arithmetic number, because the mean of its divisors is an integer number (1519000).

Almost surely, 2^79998100 is an apocalyptic number.

79998100 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79998100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109368000).

79998100 is an abundant number, since it is smaller than the sum of its proper divisors (138737900).

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

79998100 is a wasteful number, since it uses less digits than its factorization.

79998100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 79998100 is about 8944.1656961396. The cubic root of 79998100 is about 430.8835267911.

The spelling of 79998100 in words is "seventy-nine million, nine hundred ninety-eight thousand, one hundred".