22428999 has 6 divisors (see below), whose sum is σ = 32397456. Its totient is φ = 14952660.

The previous prime is 22428997. The next prime is 22429003. The reversal of 22428999 is 99982422.

It is not a de Polignac number, because 22428999 - 2¹ = 22428997 is a prime.

It is a super-2 number, since 2×22428999² = 1006119992284002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22428997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1246047 + ... + 1246064.

It is an arithmetic number, because the mean of its divisors is an integer number (5399576).

Almost surely, 2^22428999 is an apocalyptic number.

22428999 is a deficient number, since it is larger than the sum of its proper divisors (9968457).

22428999 is a wasteful number, since it uses less digits than its factorization.

22428999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492117 (or 2492114 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 22428999 is about 4735.9264141243. The cubic root of 22428999 is about 282.0135424310.

The spelling of 22428999 in words is "twenty-two million, four hundred twenty-eight thousand, nine hundred ninety-nine".