22821396 has 24 divisors (see below), whose sum is σ = 57346464. Its totient is φ = 7021920.

The previous prime is 22821391. The next prime is 22821397. The reversal of 22821396 is 69312822.

It is a happy number.

It is a super-2 number, since 2×22821396² = 1041632230777632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22821391) 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 7 ways as a sum of consecutive naturals, for example, 72990 + ... + 73301.

It is an arithmetic number, because the mean of its divisors is an integer number (2389436).

Almost surely, 2^22821396 is an apocalyptic number.

22821396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22821396 is an abundant number, since it is smaller than the sum of its proper divisors (34525068).

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

22821396 is a wasteful number, since it uses less digits than its factorization.

22821396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146311 (or 146309 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 22821396 is about 4777.1744787060. The cubic root of 22821396 is about 283.6486596262.

The spelling of 22821396 in words is "twenty-two million, eight hundred twenty-one thousand, three hundred ninety-six".