22378240 has 36 divisors (see below), whose sum is σ = 53605944. Its totient is φ = 8950784.

The previous prime is 22378231. The next prime is 22378247. The reversal of 22378240 is 4287322.

It is a junction number, because it is equal to n+sod(n) for n = 22378199 and 22378208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22378247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7462 + ... + 10021.

It is an arithmetic number, because the mean of its divisors is an integer number (1489054).

Almost surely, 2^22378240 is an apocalyptic number.

22378240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22378240 is an abundant number, since it is smaller than the sum of its proper divisors (31227704).

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

22378240 is an equidigital number, since it uses as much as digits as its factorization.

22378240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17504 (or 17490 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 22378240 is about 4730.5644483507. The cubic root of 22378240 is about 281.8006404117.

The spelling of 22378240 in words is "twenty-two million, three hundred seventy-eight thousand, two hundred forty".