22720090 has 32 divisors (see below), whose sum is σ = 42996096. Its totient is φ = 8627520.

The previous prime is 22720073. The next prime is 22720091. The reversal of 22720090 is 9002722.

It is not an unprimeable number, because it can be changed into a prime (22720091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39505 + ... + 40075.

It is an arithmetic number, because the mean of its divisors is an integer number (1343628).

Almost surely, 2^22720090 is an apocalyptic number.

22720090 is a deficient number, since it is larger than the sum of its proper divisors (20276006).

22720090 is a wasteful number, since it uses less digits than its factorization.

22720090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 22720090 is about 4766.5595559061. The cubic root of 22720090 is about 283.2283240235.

The spelling of 22720090 in words is "twenty-two million, seven hundred twenty thousand, ninety".