22865140 has 12 divisors (see below), whose sum is σ = 48016836. Its totient is φ = 9146048.

The previous prime is 22865107. The next prime is 22865173. The reversal of 22865140 is 4156822.

It is an interprime number because it is at equal distance from previous prime (22865107) and next prime (22865173).

It can be written as a sum of positive squares in 2 ways, for example, as 6120676 + 16744464 = 2474^2 + 4092^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22865099 and 22865108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571609 + ... + 571648.

It is an arithmetic number, because the mean of its divisors is an integer number (4001403).

Almost surely, 2^22865140 is an apocalyptic number.

22865140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22865140 is an abundant number, since it is smaller than the sum of its proper divisors (25151696).

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

22865140 is a wasteful number, since it uses less digits than its factorization.

22865140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143266 (or 1143264 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 22865140 is about 4781.7507254143. The cubic root of 22865140 is about 283.8297763229.

It can be divided in two parts, 22865 and 140, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22865140 in words is "twenty-two million, eight hundred sixty-five thousand, one hundred forty".