22401236 has 24 divisors (see below), whose sum is σ = 46056864. Its totient is φ = 9398880.

The previous prime is 22401229. The next prime is 22401259. The reversal of 22401236 is 63210422.

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, 19010 + ... + 20153.

It is an arithmetic number, because the mean of its divisors is an integer number (1919036).

Almost surely, 2^22401236 is an apocalyptic number.

22401236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22401236 is an abundant number, since it is smaller than the sum of its proper divisors (23655628).

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

22401236 is a wasteful number, since it uses less digits than its factorization.

22401236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39191 (or 39189 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22401236 is about 4732.9944010108. The cubic root of 22401236 is about 281.8971339856.

Adding to 22401236 its reverse (63210422), we get a palindrome (85611658).

The spelling of 22401236 in words is "twenty-two million, four hundred one thousand, two hundred thirty-six".