22071390 has 32 divisors (see below), whose sum is σ = 57787776. Its totient is φ = 5350560.

The previous prime is 22071383. The next prime is 22071403. The reversal of 22071390 is 9317022.

It is a self number, because there is not a number n which added to its sum of digits gives 22071390.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 33112 + ... + 33771.

It is an arithmetic number, because the mean of its divisors is an integer number (1805868).

Almost surely, 2^22071390 is an apocalyptic number.

22071390 is an abundant number, since it is smaller than the sum of its proper divisors (35716386).

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

22071390 is a wasteful number, since it uses less digits than its factorization.

22071390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66904.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 22071390 is about 4698.0197956160. The cubic root of 22071390 is about 280.5066930702.

The spelling of 22071390 in words is "twenty-two million, seventy-one thousand, three hundred ninety".