2172400438 has 16 divisors (see below), whose sum is σ = 3525008256. Its totient is φ = 998147520.

The previous prime is 2172400409. The next prime is 2172400441. The reversal of 2172400438 is 8340042712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181543 + ... + 193138.

It is an arithmetic number, because the mean of its divisors is an integer number (220313016).

Almost surely, 2^2172400438 is an apocalyptic number.

2172400438 is a deficient number, since it is larger than the sum of its proper divisors (1352607818).

2172400438 is a wasteful number, since it uses less digits than its factorization.

2172400438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374919.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 2172400438 is about 46609.0167027797. The cubic root of 2172400438 is about 1295.1297928475.

The spelling of 2172400438 in words is "two billion, one hundred seventy-two million, four hundred thousand, four hundred thirty-eight".