22878655 has 4 divisors (see below), whose sum is σ = 27454392. Its totient is φ = 18302920.

The previous prime is 22878643. The next prime is 22878677. The reversal of 22878655 is 55687822.

22878655 = 1228² + 1229² + ... + 1242².

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-22878655 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2287861 + ... + 2287870.

It is an arithmetic number, because the mean of its divisors is an integer number (6863598).

Almost surely, 2^22878655 is an apocalyptic number.

22878655 is a deficient number, since it is larger than the sum of its proper divisors (4575737).

22878655 is an equidigital number, since it uses as much as digits as its factorization.

22878655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575736.

The product of its digits is 268800, while the sum is 43.

The square root of 22878655 is about 4783.1637019864. The cubic root of 22878655 is about 283.8856868180.

The spelling of 22878655 in words is "twenty-two million, eight hundred seventy-eight thousand, six hundred fifty-five".