22851440 has 20 divisors (see below), whose sum is σ = 53129784. Its totient is φ = 9140544.

The previous prime is 22851403. The next prime is 22851457. The reversal of 22851440 is 4415822.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

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, 142742 + ... + 142901.

Almost surely, 2^22851440 is an apocalyptic number.

22851440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22851440 is an abundant number, since it is smaller than the sum of its proper divisors (30278344).

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

22851440 is a wasteful number, since it uses less digits than its factorization.

22851440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285656 (or 285650 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 22851440 is about 4780.3179810552. The cubic root of 22851440 is about 283.7730780068.

The spelling of 22851440 in words is "twenty-two million, eight hundred fifty-one thousand, four hundred forty".