22491270 has 40 divisors (see below), whose sum is σ = 60478704. Its totient is φ = 5997456.

The previous prime is 22491253. The next prime is 22491283. The reversal of 22491270 is 7219422.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13074 + ... + 14693.

Almost surely, 2^22491270 is an apocalyptic number.

22491270 is an abundant number, since it is smaller than the sum of its proper divisors (37987434).

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

22491270 is a wasteful number, since it uses less digits than its factorization.

22491270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27786 (or 27777 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 22491270 is about 4742.4961781745. The cubic root of 22491270 is about 282.2742917431.

The spelling of 22491270 in words is "twenty-two million, four hundred ninety-one thousand, two hundred seventy".