22303990 has 16 divisors (see below), whose sum is σ = 40905648. Its totient is φ = 8753056.

The previous prime is 22303943. The next prime is 22303993. The reversal of 22303990 is 9930322.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22303993) 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, 20512 + ... + 21571.

It is an arithmetic number, because the mean of its divisors is an integer number (2556603).

Almost surely, 2^22303990 is an apocalyptic number.

22303990 is a deficient number, since it is larger than the sum of its proper divisors (18601658).

22303990 is a wasteful number, since it uses less digits than its factorization.

22303990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42143.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 22303990 is about 4722.7100270925. The cubic root of 22303990 is about 281.4886277661.

The spelling of 22303990 in words is "twenty-two million, three hundred three thousand, nine hundred ninety".