2172477938 has 8 divisors (see below), whose sum is σ = 3266685660. Its totient is φ = 1083582720.

The previous prime is 2172477893. The next prime is 2172477941. The reversal of 2172477938 is 8397742712.

It is a happy number.

2172477938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2169044329 + 3433609 = 46573^2 + 1853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327103 + ... + 1328738.

Almost surely, 2^2172477938 is an apocalyptic number.

2172477938 is a deficient number, since it is larger than the sum of its proper divisors (1094207722).

2172477938 is a wasteful number, since it uses less digits than its factorization.

2172477938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656252.

The product of its digits is 1185408, while the sum is 50.

The square root of 2172477938 is about 46609.8480795636. The cubic root of 2172477938 is about 1295.1451938395.

The spelling of 2172477938 in words is "two billion, one hundred seventy-two million, four hundred seventy-seven thousand, nine hundred thirty-eight".