22356840 has 64 divisors (see below), whose sum is σ = 73172160. Its totient is φ = 5419520.

The previous prime is 22356827. The next prime is 22356869. The reversal of 22356840 is 4865322.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22356798 and 22356807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7149 + ... + 9788.

It is an arithmetic number, because the mean of its divisors is an integer number (1143315).

Almost surely, 2^22356840 is an apocalyptic number.

22356840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22356840 is an abundant number, since it is smaller than the sum of its proper divisors (50815320).

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

22356840 is a wasteful number, since it uses less digits than its factorization.

22356840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16962 (or 16958 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 22356840 is about 4728.3020208104. The cubic root of 22356840 is about 281.7107844172.

The spelling of 22356840 in words is "twenty-two million, three hundred fifty-six thousand, eight hundred forty".