22307040 has 144 divisors (see below), whose sum is σ = 87036768. Its totient is φ = 5096448.

The previous prime is 22307027. The next prime is 22307057. The reversal of 22307040 is 4070322.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×22307040³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8974 + ... + 11186.

It is an arithmetic number, because the mean of its divisors is an integer number (604422).

Almost surely, 2^22307040 is an apocalyptic number.

22307040 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 22307040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43518384).

22307040 is an abundant number, since it is smaller than the sum of its proper divisors (64729728).

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

22307040 is a wasteful number, since it uses less digits than its factorization.

22307040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 22307040 is about 4723.0329238742. The cubic root of 22307040 is about 281.5014580740.

Adding to 22307040 its reverse (4070322), we get a palindrome (26377362).

The spelling of 22307040 in words is "twenty-two million, three hundred seven thousand, forty".