22399994 has 8 divisors (see below), whose sum is σ = 33645780. Its totient is φ = 11184736.

The previous prime is 22399991. The next prime is 22400009. The reversal of 22399994 is 49999322.

It can be written as a sum of positive squares in 2 ways, for example, as 17935225 + 4464769 = 4235^2 + 2113^2 .

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 (22399991) 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, 5699 + ... + 8790.

Almost surely, 2^22399994 is an apocalyptic number.

22399994 is a deficient number, since it is larger than the sum of its proper divisors (11245786).

22399994 is a wasteful number, since it uses less digits than its factorization.

22399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15264.

The product of its digits is 314928, while the sum is 47.

The square root of 22399994 is about 4732.8631926140. The cubic root of 22399994 is about 281.8919241137.

The spelling of 22399994 in words is "twenty-two million, three hundred ninety-nine thousand, nine hundred ninety-four".