22631040 has 96 divisors (see below), whose sum is σ = 78167700. Its totient is φ = 6033408.

The previous prime is 22631039. The next prime is 22631041. The reversal of 22631040 is 4013622.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22631039) and next prime (22631041).

It can be written as a sum of positive squares in 2 ways, for example, as 21013056 + 1617984 = 4584^2 + 1272^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

It is not an unprimeable number, because it can be changed into a prime (22631041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3796 + ... + 7724.

Almost surely, 2^22631040 is an apocalyptic number.

22631040 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 22631040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39083850).

22631040 is an abundant number, since it is smaller than the sum of its proper divisors (55536660).

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

22631040 is a wasteful number, since it uses less digits than its factorization.

22631040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22631040 is about 4757.2092659457. The cubic root of 22631040 is about 282.8578075108.

Adding to 22631040 its reverse (4013622), we get a palindrome (26644662).

The spelling of 22631040 in words is "twenty-two million, six hundred thirty-one thousand, forty".