22947840 has 192 divisors, whose sum is σ = 82555200. Its totient is φ = 6045696.

The previous prime is 22947833. The next prime is 22947851. The reversal of 22947840 is 4874922.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22947795 and 22947804.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276439 + ... + 276521.

It is an arithmetic number, because the mean of its divisors is an integer number (429975).

Almost surely, 2^22947840 is an apocalyptic number.

22947840 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 22947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41277600).

22947840 is an abundant number, since it is smaller than the sum of its proper divisors (59607360).

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

22947840 is an equidigital number, since it uses as much as digits as its factorization.

22947840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 22947840 is about 4790.3903807519. The cubic root of 22947840 is about 284.1715554103.

The spelling of 22947840 in words is "twenty-two million, nine hundred forty-seven thousand, eight hundred forty".