423221634 has 24 divisors (see below), whose sum is σ = 1000342512. Its totient is φ = 128248920.

The previous prime is 423221629. The next prime is 423221657. The reversal of 423221634 is 436122324.

423221634 is a `hidden beast` number, since 4 + 2 + 3 + 2 + 21 + 634 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 423221598 and 423221607.

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, 1068544 + ... + 1068939.

It is an arithmetic number, because the mean of its divisors is an integer number (41680938).

Almost surely, 2^423221634 is an apocalyptic number.

423221634 is an abundant number, since it is smaller than the sum of its proper divisors (577120878).

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

423221634 is a wasteful number, since it uses less digits than its factorization.

423221634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137502 (or 2137499 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 423221634 is about 20572.3512025242. The cubic root of 423221634 is about 750.7971577525.

Adding to 423221634 its reverse (436122324), we get a palindrome (859343958).

It can be divided in two parts, 42322 and 1634, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 423221634 in words is "four hundred twenty-three million, two hundred twenty-one thousand, six hundred thirty-four".