22820490 has 192 divisors, whose sum is σ = 76826880. Its totient is φ = 4561920.

The previous prime is 22820467. The next prime is 22820491. The reversal of 22820490 is 9402822.

It is not an unprimeable number, because it can be changed into a prime (22820491) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 256366 + ... + 256454.

It is an arithmetic number, because the mean of its divisors is an integer number (400140).

Almost surely, 2^22820490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22820490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38413440).

22820490 is an abundant number, since it is smaller than the sum of its proper divisors (54006390).

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

22820490 is a wasteful number, since it uses less digits than its factorization.

22820490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22820490 is about 4777.0796518375. The cubic root of 22820490 is about 283.6449059983.

The spelling of 22820490 in words is "twenty-two million, eight hundred twenty thousand, four hundred ninety".