22390620 has 96 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 5051904.

The previous prime is 22390619. The next prime is 22390657. The reversal of 22390620 is 2609322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37081 + ... + 37679.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^22390620 is an apocalyptic number.

22390620 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 22390620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36288000).

22390620 is an abundant number, since it is smaller than the sum of its proper divisors (50185380).

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

22390620 is a wasteful number, since it uses less digits than its factorization.

22390620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 22390620 is about 4731.8727793549. The cubic root of 22390620 is about 281.8525963712.

Adding to 22390620 its reverse (2609322), we get a palindrome (24999942).

The spelling of 22390620 in words is "twenty-two million, three hundred ninety thousand, six hundred twenty".