22042140 has 24 divisors (see below), whose sum is σ = 61718160. Its totient is φ = 5877888.

The previous prime is 22042127. The next prime is 22042157. The reversal of 22042140 is 4124022.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 183625 + ... + 183744.

It is an arithmetic number, because the mean of its divisors is an integer number (2571590).

Almost surely, 2^22042140 is an apocalyptic number.

22042140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22042140 is an abundant number, since it is smaller than the sum of its proper divisors (39676020).

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

22042140 is a wasteful number, since it uses less digits than its factorization.

22042140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367381 (or 367379 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22042140 is about 4694.9057498527. The cubic root of 22042140 is about 280.3827249239.

Adding to 22042140 its reverse (4124022), we get a palindrome (26166162).

The spelling of 22042140 in words is "twenty-two million, forty-two thousand, one hundred forty".