22428994 has 8 divisors (see below), whose sum is σ = 38449728. Its totient is φ = 9612420.

The previous prime is 22428983. The next prime is 22428997. The reversal of 22428994 is 49982422.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 801022 + ... + 801049.

It is an arithmetic number, because the mean of its divisors is an integer number (4806216).

Almost surely, 2^22428994 is an apocalyptic number.

22428994 is a deficient number, since it is larger than the sum of its proper divisors (16020734).

22428994 is a wasteful number, since it uses less digits than its factorization.

22428994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602080.

The product of its digits is 82944, while the sum is 40.

The square root of 22428994 is about 4735.9258862444. The cubic root of 22428994 is about 282.0135214750.

It can be divided in two parts, 2242 and 8994, that added together give a square (11236 = 106²).

The spelling of 22428994 in words is "twenty-two million, four hundred twenty-eight thousand, nine hundred ninety-four".