22878442 has 4 divisors (see below), whose sum is σ = 34317666. Its totient is φ = 11439220.

The previous prime is 22878439. The next prime is 22878467. The reversal of 22878442 is 24487822.

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

It can be written as a sum of positive squares in only one way, i.e., 22838841 + 39601 = 4779^2 + 199^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719609 + ... + 5719612.

Almost surely, 2^22878442 is an apocalyptic number.

22878442 is a deficient number, since it is larger than the sum of its proper divisors (11439224).

22878442 is a wasteful number, since it uses less digits than its factorization.

22878442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11439223.

The product of its digits is 57344, while the sum is 37.

The square root of 22878442 is about 4783.1414363366. The cubic root of 22878442 is about 283.8848058245.

It can be divided in two parts, 228784 and 42, that added together give a triangular number (228826 = T₆₇₆).

The spelling of 22878442 in words is "twenty-two million, eight hundred seventy-eight thousand, four hundred forty-two".