22673640 has 128 divisors (see below), whose sum is σ = 75427200. Its totient is φ = 5406720.

The previous prime is 22673633. The next prime is 22673647. The reversal of 22673640 is 4637622.

It is an interprime number because it is at equal distance from previous prime (22673633) and next prime (22673647).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22673598 and 22673607.

It is not an unprimeable number, because it can be changed into a prime (22673647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117384 + ... + 117576.

It is an arithmetic number, because the mean of its divisors is an integer number (589275).

Almost surely, 2^22673640 is an apocalyptic number.

22673640 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 22673640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37713600).

22673640 is an abundant number, since it is smaller than the sum of its proper divisors (52753560).

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

22673640 is a wasteful number, since it uses less digits than its factorization.

22673640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 22673640 is about 4761.6845758618. The cubic root of 22673640 is about 283.0351773209.

The spelling of 22673640 in words is "twenty-two million, six hundred seventy-three thousand, six hundred forty".