22274840 has 128 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 7008768.

The previous prime is 22274809. The next prime is 22274869. The reversal of 22274840 is 4847222.

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, 281921 + ... + 281999.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^22274840 is an apocalyptic number.

22274840 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 22274840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31104000).

22274840 is an abundant number, since it is smaller than the sum of its proper divisors (39933160).

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

22274840 is a wasteful number, since it uses less digits than its factorization.

22274840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 22274840 is about 4719.6228662892. The cubic root of 22274840 is about 281.3659446235.

The spelling of 22274840 in words is "twenty-two million, two hundred seventy-four thousand, eight hundred forty".