22087906 has 4 divisors (see below), whose sum is σ = 33131862. Its totient is φ = 11043952.

The previous prime is 22087883. The next prime is 22087907. The reversal of 22087906 is 60978022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19882681 + 2205225 = 4459^2 + 1485^2 .

It is not an unprimeable number, because it can be changed into a prime (22087907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521975 + ... + 5521978.

Almost surely, 2^22087906 is an apocalyptic number.

22087906 is a deficient number, since it is larger than the sum of its proper divisors (11043956).

22087906 is a wasteful number, since it uses less digits than its factorization.

22087906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043955.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 22087906 is about 4699.7772287631. Note that the first 3 decimals coincide. The cubic root of 22087906 is about 280.5766432551.

The spelling of 22087906 in words is "twenty-two million, eighty-seven thousand, nine hundred six".