22797540 has 36 divisors (see below), whose sum is σ = 69153084. Its totient is φ = 6079296.

The previous prime is 22797503. The next prime is 22797557. The reversal of 22797540 is 4579722.

22797540 is a `hidden beast` number, since 2 + 27 + 97 + 540 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 17489124 = 2304^2 + 4182^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22797495 and 22797504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63147 + ... + 63506.

It is an arithmetic number, because the mean of its divisors is an integer number (1920919).

Almost surely, 2^22797540 is an apocalyptic number.

22797540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22797540 is an abundant number, since it is smaller than the sum of its proper divisors (46355544).

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

22797540 is a wasteful number, since it uses less digits than its factorization.

22797540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126668 (or 126663 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 22797540 is about 4774.6769524231. The cubic root of 22797540 is about 283.5497892267.

The spelling of 22797540 in words is "twenty-two million, seven hundred ninety-seven thousand, five hundred forty".