22790640 has 40 divisors (see below), whose sum is σ = 70651728. Its totient is φ = 6077440.

The previous prime is 22790639. The next prime is 22790641. The reversal of 22790640 is 4609722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22790639) and next prime (22790641).

It is a tau number, because it is divible by the number of its divisors (40).

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 = 22790598 and 22790607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22790641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47241 + ... + 47720.

Almost surely, 2^22790640 is an apocalyptic number.

22790640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22790640 is an abundant number, since it is smaller than the sum of its proper divisors (47861088).

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

22790640 is a wasteful number, since it uses less digits than its factorization.

22790640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94977 (or 94971 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 22790640 is about 4773.9543357682. The cubic root of 22790640 is about 283.5211795468.

The spelling of 22790640 in words is "twenty-two million, seven hundred ninety thousand, six hundred forty".