22491396 has 36 divisors (see below), whose sum is σ = 57168384. Its totient is φ = 7455600.

The previous prime is 22491367. The next prime is 22491409. The reversal of 22491396 is 69319422.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22491396.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5241 + ... + 8511.

Almost surely, 2^22491396 is an apocalyptic number.

It is an amenable number.

22491396 is an abundant number, since it is smaller than the sum of its proper divisors (34676988).

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

22491396 is a wasteful number, since it uses less digits than its factorization.

22491396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472 (or 3467 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 22491396 is about 4742.5094622995. The cubic root of 22491396 is about 282.2748188587.

The spelling of 22491396 in words is "twenty-two million, four hundred ninety-one thousand, three hundred ninety-six".