22507790 has 8 divisors (see below), whose sum is σ = 40514040. Its totient is φ = 9003112.

The previous prime is 22507789. The next prime is 22507801. The reversal of 22507790 is 9770522.

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

It is a super-2 number, since 2×22507790² = 1013201221368200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125380 + ... + 1125399.

It is an arithmetic number, because the mean of its divisors is an integer number (5064255).

Almost surely, 2^22507790 is an apocalyptic number.

22507790 is a deficient number, since it is larger than the sum of its proper divisors (18006250).

22507790 is a wasteful number, since it uses less digits than its factorization.

22507790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250786.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 22507790 is about 4744.2375572899. The cubic root of 22507790 is about 282.3433856635.

The spelling of 22507790 in words is "twenty-two million, five hundred seven thousand, seven hundred ninety".