422427187 has 24 divisors (see below), whose sum is σ = 543527376. Its totient is φ = 325176768.

The previous prime is 422427179. The next prime is 422427191. The reversal of 422427187 is 781724224.

It is not a de Polignac number, because 422427187 - 2³ = 422427179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (422427107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14608 + ... + 32530.

It is an arithmetic number, because the mean of its divisors is an integer number (22646974).

Almost surely, 2^422427187 is an apocalyptic number.

422427187 is a deficient number, since it is larger than the sum of its proper divisors (121100189).

422427187 is a wasteful number, since it uses less digits than its factorization.

422427187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17987 (or 17980 counting only the distinct ones).

The product of its digits is 50176, while the sum is 37.

The square root of 422427187 is about 20553.0335230593. The cubic root of 422427187 is about 750.3270792641.

The spelling of 422427187 in words is "four hundred twenty-two million, four hundred twenty-seven thousand, one hundred eighty-seven".