22791420 has 72 divisors (see below), whose sum is σ = 69748224. Its totient is φ = 6023808.

The previous prime is 22791401. The next prime is 22791427. The reversal of 22791420 is 2419722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22791427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22362 + ... + 23358.

Almost surely, 2^22791420 is an apocalyptic number.

22791420 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 22791420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34874112).

22791420 is an abundant number, since it is smaller than the sum of its proper divisors (46956804).

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

22791420 is a wasteful number, since it uses less digits than its factorization.

22791420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 22791420 is about 4774.0360283517. The cubic root of 22791420 is about 283.5244139739.

The spelling of 22791420 in words is "twenty-two million, seven hundred ninety-one thousand, four hundred twenty".