422420100 has 36 divisors (see below), whose sum is σ = 1222203024. Its totient is φ = 112645280.

The previous prime is 422420081. The next prime is 422420113. The reversal of 422420100 is 1024224.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 422420100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703734 + ... + 704333.

It is an arithmetic number, because the mean of its divisors is an integer number (33950084).

Almost surely, 2^422420100 is an apocalyptic number.

It is an amenable number.

422420100 is an abundant number, since it is smaller than the sum of its proper divisors (799782924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422420100 is a wasteful number, since it uses less digits than its factorization.

422420100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408084 (or 1408077 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 422420100 is about 20552.8611146964. The cubic root of 422420100 is about 750.3228831975.

Adding to 422420100 its reverse (1024224), we get a palindrome (423444324).

The spelling of 422420100 in words is "four hundred twenty-two million, four hundred twenty thousand, one hundred".