22782400 has 84 divisors (see below), whose sum is σ = 58110120. Its totient is φ = 8780800.

The previous prime is 22782391. The next prime is 22782407. The reversal of 22782400 is 428722.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22782407) 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 11 ways as a sum of consecutive naturals, for example, 46155 + ... + 46645.

Almost surely, 2^22782400 is an apocalyptic number.

22782400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22782400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29055060).

22782400 is an abundant number, since it is smaller than the sum of its proper divisors (35327720).

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

22782400 is a wasteful number, since it uses less digits than its factorization.

22782400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 22782400 is about 4773.0912415331. The cubic root of 22782400 is about 283.4870062175.

The spelling of 22782400 in words is "twenty-two million, seven hundred eighty-two thousand, four hundred".