22390000 has 50 divisors (see below), whose sum is σ = 54232640. Its totient is φ = 8952000.

The previous prime is 22389959. The next prime is 22390007. The reversal of 22390000 is 9322.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22390007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8881 + ... + 11119.

Almost surely, 2^22390000 is an apocalyptic number.

22390000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27116320).

22390000 is an abundant number, since it is smaller than the sum of its proper divisors (31842640).

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

22390000 is an equidigital number, since it uses as much as digits as its factorization.

22390000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 22390000 is about 4731.8072657284. The cubic root of 22390000 is about 281.8499948320.

Adding to 22390000 its reverse (9322), we get a palindrome (22399322).

The spelling of 22390000 in words is "twenty-two million, three hundred ninety thousand".