22506790 has 8 divisors (see below), whose sum is σ = 40512240. Its totient is φ = 9002712.

The previous prime is 22506779. The next prime is 22506791. The reversal of 22506790 is 9760522.

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

It is a super-2 number, since 2×22506790² = 1013111192208200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506791) 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, 1125330 + ... + 1125349.

It is an arithmetic number, because the mean of its divisors is an integer number (5064030).

Almost surely, 2^22506790 is an apocalyptic number.

22506790 is a deficient number, since it is larger than the sum of its proper divisors (18005450).

22506790 is a wasteful number, since it uses less digits than its factorization.

22506790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250686.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 22506790 is about 4744.1321651067. The cubic root of 22506790 is about 282.3392041843.

The spelling of 22506790 in words is "twenty-two million, five hundred six thousand, seven hundred ninety".