22389040 has 20 divisors (see below), whose sum is σ = 52054704. Its totient is φ = 8955584.

The previous prime is 22389023. The next prime is 22389041. The reversal of 22389040 is 4098322.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×22389040² = 1002538224243200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22389041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139852 + ... + 140011.

Almost surely, 2^22389040 is an apocalyptic number.

22389040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22389040 is an abundant number, since it is smaller than the sum of its proper divisors (29665664).

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

22389040 is a wasteful number, since it uses less digits than its factorization.

22389040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279876 (or 279870 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22389040 is about 4731.7058234848. The cubic root of 22389040 is about 281.8459665476.

The spelling of 22389040 in words is "twenty-two million, three hundred eighty-nine thousand, forty".