22688040 has 32 divisors (see below), whose sum is σ = 68064480. Its totient is φ = 6050112.

The previous prime is 22688011. The next prime is 22688041. The reversal of 22688040 is 4088622.

It is a happy number.

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 = 22687989 and 22688007.

It is not an unprimeable number, because it can be changed into a prime (22688041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94414 + ... + 94653.

It is an arithmetic number, because the mean of its divisors is an integer number (2127015).

Almost surely, 2^22688040 is an apocalyptic number.

22688040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22688040 is an abundant number, since it is smaller than the sum of its proper divisors (45376440).

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

22688040 is a wasteful number, since it uses less digits than its factorization.

22688040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189081 (or 189077 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 22688040 is about 4763.1964057763. The cubic root of 22688040 is about 283.0950830680.

The spelling of 22688040 in words is "twenty-two million, six hundred eighty-eight thousand, forty".