22040399 has 8 divisors (see below), whose sum is σ = 23274240. Its totient is φ = 20813976.

The previous prime is 22040393. The next prime is 22040429. The reversal of 22040399 is 99304022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22040399 - 2¹² = 22036303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22040393) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 8264.

It is an arithmetic number, because the mean of its divisors is an integer number (2909280).

Almost surely, 2^22040399 is an apocalyptic number.

22040399 is a deficient number, since it is larger than the sum of its proper divisors (1233841).

22040399 is a wasteful number, since it uses less digits than its factorization.

22040399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 22040399 is about 4694.7203324586. The cubic root of 22040399 is about 280.3753427131.

The spelling of 22040399 in words is "twenty-two million, forty thousand, three hundred ninety-nine".