22328040 has 128 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 4831488.

The previous prime is 22328039. The next prime is 22328041. The reversal of 22328040 is 4082322.

It is an interprime number because it is at equal distance from previous prime (22328039) and next prime (22328041).

It is a super-3 number, since 3×22328040³ (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 junction number, because it is equal to n+sod(n) for n = 22327998 and 22328016.

It is not an unprimeable number, because it can be changed into a prime (22328041) 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, 15261 + ... + 16659.

It is an arithmetic number, because the mean of its divisors is an integer number (630000).

Almost surely, 2^22328040 is an apocalyptic number.

22328040 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 22328040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40320000).

22328040 is an abundant number, since it is smaller than the sum of its proper divisors (58311960).

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

22328040 is a wasteful number, since it uses less digits than its factorization.

22328040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 22328040 is about 4725.2555486450. The cubic root of 22328040 is about 281.5897661678.

The spelling of 22328040 in words is "twenty-two million, three hundred twenty-eight thousand, forty".