2172400 has 30 divisors (see below), whose sum is σ = 5220152. Its totient is φ = 868800.

The previous prime is 2172397. The next prime is 2172427. The reversal of 2172400 is 42712.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2316 + ... + 3115.

2^2172400 is an apocalyptic number.

2172400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172400 is an abundant number, since it is smaller than the sum of its proper divisors (3047752).

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

2172400 is a wasteful number, since it uses less digits than its factorization.

2172400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449 (or 5438 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2172400 is about 1473.9063742314. The cubic root of 2172400 is about 129.5129705806.

The spelling of 2172400 in words is "two million, one hundred seventy-two thousand, four hundred".