22061400 has 96 divisors (see below), whose sum is σ = 69370560. Its totient is φ = 5799040.

The previous prime is 22061383. The next prime is 22061401. The reversal of 22061400 is 416022.

22061400 = 5² + 6² + ... + 404².

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22061400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49579 + ... + 50021.

It is an arithmetic number, because the mean of its divisors is an integer number (722610).

Almost surely, 2^22061400 is an apocalyptic number.

22061400 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 22061400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34685280).

22061400 is an abundant number, since it is smaller than the sum of its proper divisors (47309160).

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

22061400 is a wasteful number, since it uses less digits than its factorization.

22061400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22061400 is about 4696.9564613694. The cubic root of 22061400 is about 280.4643655025.

Adding to 22061400 its reverse (416022), we get a palindrome (22477422).

The spelling of 22061400 in words is "twenty-two million, sixty-one thousand, four hundred".