22455138 has 8 divisors (see below), whose sum is σ = 44910288. Its totient is φ = 7485044.

The previous prime is 22455101. The next prime is 22455149. The reversal of 22455138 is 83155422.

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

22455138 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871256 + ... + 1871267.

It is an arithmetic number, because the mean of its divisors is an integer number (5613786).

Almost surely, 2^22455138 is an apocalyptic number.

22455138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22455138 is a wasteful number, since it uses less digits than its factorization.

22455138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742528.

The product of its digits is 9600, while the sum is 30.

The square root of 22455138 is about 4738.6852607026. The cubic root of 22455138 is about 282.1230537859.

The spelling of 22455138 in words is "twenty-two million, four hundred fifty-five thousand, one hundred thirty-eight".