22837428 has 18 divisors (see below), whose sum is σ = 57728034. Its totient is φ = 7612464.

The previous prime is 22837387. The next prime is 22837433. The reversal of 22837428 is 82473822.

22837428 is a `hidden beast` number, since 228 + 3 + 7 + 428 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19554084 + 3283344 = 4422^2 + 1812^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 634373 = 22837428 / (2 + 2 + 8 + 3 + 7 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 22837392 and 22837401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317151 + ... + 317222.

It is an arithmetic number, because the mean of its divisors is an integer number (3207113).

Almost surely, 2^22837428 is an apocalyptic number.

It is an amenable number.

22837428 is an abundant number, since it is smaller than the sum of its proper divisors (34890606).

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

22837428 is a wasteful number, since it uses less digits than its factorization.

22837428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634383 (or 634378 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 22837428 is about 4778.8521634384. The cubic root of 22837428 is about 283.7150650127.

The spelling of 22837428 in words is "twenty-two million, eight hundred thirty-seven thousand, four hundred twenty-eight".