22139286 has 16 divisors (see below), whose sum is σ = 47684784. Its totient is φ = 6812064.

The previous prime is 22139269. The next prime is 22139297. The reversal of 22139286 is 68293122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141841 + ... + 141996.

It is an arithmetic number, because the mean of its divisors is an integer number (2980299).

Almost surely, 2^22139286 is an apocalyptic number.

22139286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22139286 is an abundant number, since it is smaller than the sum of its proper divisors (25545498).

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

22139286 is a wasteful number, since it uses less digits than its factorization.

22139286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283855.

The product of its digits is 10368, while the sum is 33.

The square root of 22139286 is about 4705.2402701669. The cubic root of 22139286 is about 280.7940301569.

The spelling of 22139286 in words is "twenty-two million, one hundred thirty-nine thousand, two hundred eighty-six".