23090220 has 72 divisors (see below), whose sum is σ = 71954064. Its totient is φ = 5989248.

The previous prime is 23090219. The next prime is 23090261. The reversal of 23090220 is 2209032.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23090193 and 23090202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4927 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (999362).

Almost surely, 2^23090220 is an apocalyptic number.

23090220 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 23090220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35977032).

23090220 is an abundant number, since it is smaller than the sum of its proper divisors (48863844).

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

23090220 is a wasteful number, since it uses less digits than its factorization.

23090220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519 (or 3514 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 23090220 is about 4805.2284024799. The cubic root of 23090220 is about 284.7580587514.

Adding to 23090220 its reverse (2209032), we get a palindrome (25299252).

The spelling of 23090220 in words is "twenty-three million, ninety thousand, two hundred twenty".