22845420 has 108 divisors (see below), whose sum is σ = 75138336. Its totient is φ = 5616000.

The previous prime is 22845413. The next prime is 22845437. The reversal of 22845420 is 2454822.

It is a happy number.

22845420 is a nontrivial binomial coefficient, being equal to C(6760, 2).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30045 + ... + 30795.

Almost surely, 2^22845420 is an apocalyptic number.

22845420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

22845420 is the 6759-th triangular number and also the 3380-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22845420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37569168).

22845420 is an abundant number, since it is smaller than the sum of its proper divisors (52292916).

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

22845420 is a wasteful number, since it uses less digits than its factorization.

22845420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 22845420 is about 4779.6882743543. The cubic root of 22845420 is about 283.7481566894.

The spelling of 22845420 in words is "twenty-two million, eight hundred forty-five thousand, four hundred twenty".