22403855 has 8 divisors (see below), whose sum is σ = 27752064. Its totient is φ = 17344800.

The previous prime is 22403809. The next prime is 22403873. The reversal of 22403855 is 55830422.

22403855 = 99² + 100² + ... + 408².

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

It is not a de Polignac number, because 22403855 - 2⁸ = 22403599 is a prime.

It is a super-2 number, since 2×22403855² = 1003865437722050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72116 + ... + 72425.

It is an arithmetic number, because the mean of its divisors is an integer number (3469008).

Almost surely, 2^22403855 is an apocalyptic number.

22403855 is a deficient number, since it is larger than the sum of its proper divisors (5348209).

22403855 is a wasteful number, since it uses less digits than its factorization.

22403855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144577.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 22403855 is about 4733.2710676656. The cubic root of 22403855 is about 281.9081193887.

The spelling of 22403855 in words is "twenty-two million, four hundred three thousand, eight hundred fifty-five".