22787438 has 4 divisors (see below), whose sum is σ = 34181160. Its totient is φ = 11393718.

The previous prime is 22787423. The next prime is 22787447. The reversal of 22787438 is 83478722.

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

It is a junction number, because it is equal to n+sod(n) for n = 22787395 and 22787404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5696858 + ... + 5696861.

It is an arithmetic number, because the mean of its divisors is an integer number (8545290).

Almost surely, 2^22787438 is an apocalyptic number.

22787438 is a deficient number, since it is larger than the sum of its proper divisors (11393722).

22787438 is a wasteful number, since it uses less digits than its factorization.

22787438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11393721.

The product of its digits is 150528, while the sum is 41.

The square root of 22787438 is about 4773.6189625901. The cubic root of 22787438 is about 283.5079010351.

The spelling of 22787438 in words is "twenty-two million, seven hundred eighty-seven thousand, four hundred thirty-eight".