22505398 has 8 divisors (see below), whose sum is σ = 34670592. Its totient is φ = 10948536.

The previous prime is 22505387. The next prime is 22505423. The reversal of 22505398 is 89350522.

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

It is a congruent 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, 151990 + ... + 152137.

It is an arithmetic number, because the mean of its divisors is an integer number (4333824).

Almost surely, 2^22505398 is an apocalyptic number.

22505398 is a deficient number, since it is larger than the sum of its proper divisors (12165194).

22505398 is a wasteful number, since it uses less digits than its factorization.

22505398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304166.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 22505398 is about 4743.9854552897. The cubic root of 22505398 is about 282.3333833590. Note that the first 4 decimals are identical.

The spelling of 22505398 in words is "twenty-two million, five hundred five thousand, three hundred ninety-eight".