22407420 has 96 divisors (see below), whose sum is σ = 74059776. Its totient is φ = 4953600.

The previous prime is 22407379. The next prime is 22407439. The reversal of 22407420 is 2470422.

It is a super-3 number, since 3×22407420³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12160 + ... + 13880.

It is an arithmetic number, because the mean of its divisors is an integer number (771456).

Almost surely, 2^22407420 is an apocalyptic number.

22407420 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 22407420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37029888).

22407420 is an abundant number, since it is smaller than the sum of its proper divisors (51652356).

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

22407420 is a wasteful number, since it uses less digits than its factorization.

22407420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 22407420 is about 4733.6476421466. The cubic root of 22407420 is about 281.9230714158.

Adding to 22407420 its reverse (2470422), we get a palindrome (24877842).

The spelling of 22407420 in words is "twenty-two million, four hundred seven thousand, four hundred twenty".