22778952 has 32 divisors (see below), whose sum is σ = 65083200. Its totient is φ = 6508224.

The previous prime is 22778941. The next prime is 22778969. The reversal of 22778952 is 25987722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67627 + ... + 67962.

It is an arithmetic number, because the mean of its divisors is an integer number (2033850).

Almost surely, 2^22778952 is an apocalyptic number.

It is an amenable number.

22778952 is an abundant number, since it is smaller than the sum of its proper divisors (42304248).

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

22778952 is a wasteful number, since it uses less digits than its factorization.

22778952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135605 (or 135601 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 22778952 is about 4772.7300363628. The cubic root of 22778952 is about 283.4727040587.

The spelling of 22778952 in words is "twenty-two million, seven hundred seventy-eight thousand, nine hundred fifty-two".