22140402 has 8 divisors (see below), whose sum is σ = 44280816. Its totient is φ = 7380132.

The previous prime is 22140383. The next prime is 22140439. The reversal of 22140402 is 20404122.

It is a sphenic number, since it is the product of 3 distinct primes.

22140402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845028 + ... + 1845039.

It is an arithmetic number, because the mean of its divisors is an integer number (5535102).

Almost surely, 2^22140402 is an apocalyptic number.

22140402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22140402 is a wasteful number, since it uses less digits than its factorization.

22140402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690072.

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

The square root of 22140402 is about 4705.3588598533. The cubic root of 22140402 is about 280.7987481783.

Adding to 22140402 its reverse (20404122), we get a palindrome (42544524).

The spelling of 22140402 in words is "twenty-two million, one hundred forty thousand, four hundred two".