22913778 has 8 divisors (see below), whose sum is σ = 45827568. Its totient is φ = 7637924.

The previous prime is 22913777. The next prime is 22913783. The reversal of 22913778 is 87731922.

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

22913778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (22913777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909476 + ... + 1909487.

It is an arithmetic number, because the mean of its divisors is an integer number (5728446).

Almost surely, 2^22913778 is an apocalyptic number.

22913778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22913778 is a wasteful number, since it uses less digits than its factorization.

22913778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818968.

The product of its digits is 42336, while the sum is 39.

The square root of 22913778 is about 4786.8338178800. The cubic root of 22913778 is about 284.0308850231.

The spelling of 22913778 in words is "twenty-two million, nine hundred thirteen thousand, seven hundred seventy-eight".