22777640 has 32 divisors (see below), whose sum is σ = 51442560. Its totient is φ = 9076800.

The previous prime is 22777609. The next prime is 22777649. The reversal of 22777640 is 4677722.

It is a self number, because there is not a number n which added to its sum of digits gives 22777640.

It is not an unprimeable number, because it can be changed into a prime (22777649) 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, 11525 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (1607580).

Almost surely, 2^22777640 is an apocalyptic number.

22777640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22777640 is an abundant number, since it is smaller than the sum of its proper divisors (28664920).

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

22777640 is a wasteful number, since it uses less digits than its factorization.

22777640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 22777640 is about 4772.5925868442. The cubic root of 22777640 is about 283.4672615588.

The spelling of 22777640 in words is "twenty-two million, seven hundred seventy-seven thousand, six hundred forty".