22402645 has 8 divisors (see below), whose sum is σ = 27810360. Its totient is φ = 17304000.

The previous prime is 22402631. The next prime is 22402657. The reversal of 22402645 is 54620422.

It can be written as a sum of positive squares in 4 ways, for example, as 7177041 + 15225604 = 2679^2 + 3902^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-22402645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77106 + ... + 77395.

It is an arithmetic number, because the mean of its divisors is an integer number (3476295).

Almost surely, 2^22402645 is an apocalyptic number.

It is an amenable number.

22402645 is a deficient number, since it is larger than the sum of its proper divisors (5407715).

22402645 is a wasteful number, since it uses less digits than its factorization.

22402645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154535.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 22402645 is about 4733.1432473569. The cubic root of 22402645 is about 281.9030441466.

The spelling of 22402645 in words is "twenty-two million, four hundred two thousand, six hundred forty-five".