22828381 has 4 divisors (see below), whose sum is σ = 22846912. Its totient is φ = 22809852.

The previous prime is 22828363. The next prime is 22828391. The reversal of 22828381 is 18382822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22828381 - 2¹⁵ = 22795613 is a prime.

It is a super-2 number, since 2×22828381² = 1042269958162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22828321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7275 + ... + 9928.

It is an arithmetic number, because the mean of its divisors is an integer number (5711728).

Almost surely, 2^22828381 is an apocalyptic number.

It is an amenable number.

22828381 is a deficient number, since it is larger than the sum of its proper divisors (18531).

22828381 is a wasteful number, since it uses less digits than its factorization.

22828381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18530.

The product of its digits is 12288, while the sum is 34.

The square root of 22828381 is about 4777.9055034607. The cubic root of 22828381 is about 283.6775956852.

The spelling of 22828381 in words is "twenty-two million, eight hundred twenty-eight thousand, three hundred eighty-one".