472122639 has 24 divisors (see below), whose sum is σ = 706555200. Its totient is φ = 303428160.

The previous prime is 472122611. The next prime is 472122643. The reversal of 472122639 is 936221274.

472122639 is a `hidden beast` number, since 4 + 7 + 2 + 12 + 2 + 639 = 666.

It is not a de Polignac number, because 472122639 - 2⁸ = 472122383 is a prime.

It is a super-4 number, since 4×472122639⁴ (a number of 36 digits) contains 4444 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472122649) 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 23 ways as a sum of consecutive naturals, for example, 270309 + ... + 272049.

It is an arithmetic number, because the mean of its divisors is an integer number (29439800).

Almost surely, 2^472122639 is an apocalyptic number.

472122639 is a deficient number, since it is larger than the sum of its proper divisors (234432561).

472122639 is a wasteful number, since it uses less digits than its factorization.

472122639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2812 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 472122639 is about 21728.3832578496. The cubic root of 472122639 is about 778.6667114011. Note that the first 3 decimals are identical.

The spelling of 472122639 in words is "four hundred seventy-two million, one hundred twenty-two thousand, six hundred thirty-nine".