22071438 has 12 divisors (see below), whose sum is σ = 47821488. Its totient is φ = 7357140.

The previous prime is 22071433. The next prime is 22071461. The reversal of 22071438 is 83417022.

22071438 is a `hidden beast` number, since 220 + 7 + 1 + 438 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22071431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 613078 + ... + 613113.

It is an arithmetic number, because the mean of its divisors is an integer number (3985124).

Almost surely, 2^22071438 is an apocalyptic number.

22071438 is an abundant number, since it is smaller than the sum of its proper divisors (25750050).

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

22071438 is a wasteful number, since it uses less digits than its factorization.

22071438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226199 (or 1226196 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22071438 is about 4698.0249041486. The cubic root of 22071438 is about 280.5068964150.

The spelling of 22071438 in words is "twenty-two million, seventy-one thousand, four hundred thirty-eight".