22812490 has 8 divisors (see below), whose sum is σ = 41062500. Its totient is φ = 9124992.

The previous prime is 22812479. The next prime is 22812539. The reversal of 22812490 is 9421822.

22812490 = 2134² + 2135² + ... + 2138².

It can be written as a sum of positive squares in 2 ways, for example, as 22439169 + 373321 = 4737^2 + 611^2 .

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

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, 1140615 + ... + 1140634.

Almost surely, 2^22812490 is an apocalyptic number.

22812490 is a deficient number, since it is larger than the sum of its proper divisors (18250010).

22812490 is a wasteful number, since it uses less digits than its factorization.

22812490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281256.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22812490 is about 4776.2422467877. The cubic root of 22812490 is about 283.6117570686.

The spelling of 22812490 in words is "twenty-two million, eight hundred twelve thousand, four hundred ninety".