2172079800 has 576 divisors, whose sum is σ = 8774438400. Its totient is φ = 493516800.

The previous prime is 2172079751. The next prime is 2172079831. The reversal of 2172079800 is 89702712.

2172079800 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9088081 + ... + 9088319.

It is an arithmetic number, because the mean of its divisors is an integer number (15233400).

Almost surely, 2^2172079800 is an apocalyptic number.

2172079800 is a gapful number since it is divisible by the number (20) 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 2172079800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4387219200).

2172079800 is an abundant number, since it is smaller than the sum of its proper divisors (6602358600).

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

2172079800 is a wasteful number, since it uses less digits than its factorization.

2172079800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 2172079800 is about 46605.5769195061. The cubic root of 2172079800 is about 1295.0660709769.

The spelling of 2172079800 in words is "two billion, one hundred seventy-two million, seventy-nine thousand, eight hundred".