22978655 has 32 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 15079680.

The previous prime is 22978649. The next prime is 22978661. The reversal of 22978655 is 55687922.

It is an interprime number because it is at equal distance from previous prime (22978649) and next prime (22978661).

It is not a de Polignac number, because 22978655 - 2¹² = 22974559 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96026 + ... + 96264.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^22978655 is an apocalyptic number.

22978655 is a deficient number, since it is larger than the sum of its proper divisors (9922465).

22978655 is a wasteful number, since it uses less digits than its factorization.

22978655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 302400, while the sum is 44.

The square root of 22978655 is about 4793.6056366789. The cubic root of 22978655 is about 284.2986963496.

The spelling of 22978655 in words is "twenty-two million, nine hundred seventy-eight thousand, six hundred fifty-five".