422640973 has 16 divisors (see below), whose sum is σ = 439968256. Its totient is φ = 405673920.

The previous prime is 422640971. The next prime is 422640989. The reversal of 422640973 is 379046224.

It is not a de Polignac number, because 422640973 - 2¹ = 422640971 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422640971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493290 + ... + 1493572.

It is an arithmetic number, because the mean of its divisors is an integer number (27498016).

Almost surely, 2^422640973 is an apocalyptic number.

It is an amenable number.

422640973 is a deficient number, since it is larger than the sum of its proper divisors (17327283).

422640973 is a wasteful number, since it uses less digits than its factorization.

422640973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 422640973 is about 20558.2337033122. The cubic root of 422640973 is about 750.4536354904.

The spelling of 422640973 in words is "four hundred twenty-two million, six hundred forty thousand, nine hundred seventy-three".