22773440 has 28 divisors (see below), whose sum is σ = 54230016. Its totient is φ = 9109248.

The previous prime is 22773407. The next prime is 22773461. The reversal of 22773440 is 4437722.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 35264 + ... + 35903.

Almost surely, 2^22773440 is an apocalyptic number.

22773440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22773440 is an abundant number, since it is smaller than the sum of its proper divisors (31456576).

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

22773440 is an equidigital number, since it uses as much as digits as its factorization.

22773440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71184 (or 71174 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 22773440 is about 4772.1525541416. The cubic root of 22773440 is about 283.4498375166.

The spelling of 22773440 in words is "twenty-two million, seven hundred seventy-three thousand, four hundred forty".