22842820 has 144 divisors (see below), whose sum is σ = 65959488. Its totient is φ = 6531840.

The previous prime is 22842797. The next prime is 22842823. The reversal of 22842820 is 2824822.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (22842823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140059 + ... + 140221.

It is an arithmetic number, because the mean of its divisors is an integer number (458052).

Almost surely, 2^22842820 is an apocalyptic number.

22842820 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 22842820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32979744).

22842820 is an abundant number, since it is smaller than the sum of its proper divisors (43116668).

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

22842820 is a wasteful number, since it uses less digits than its factorization.

22842820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 22842820 is about 4779.4162823508. The cubic root of 22842820 is about 283.7373919760.

The spelling of 22842820 in words is "twenty-two million, eight hundred forty-two thousand, eight hundred twenty".