23091906 has 8 divisors (see below), whose sum is σ = 46183824. Its totient is φ = 7697300.

The previous prime is 23091883. The next prime is 23091911. The reversal of 23091906 is 60919032.

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

23091906 is an admirable number.

It is a super-2 number, since 2×23091906² = 1066472245425672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1924320 + ... + 1924331.

It is an arithmetic number, because the mean of its divisors is an integer number (5772978).

Almost surely, 2^23091906 is an apocalyptic number.

23091906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23091906 is a wasteful number, since it uses less digits than its factorization.

23091906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3848656.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 23091906 is about 4805.4038331861. The cubic root of 23091906 is about 284.7649893971.

The spelling of 23091906 in words is "twenty-three million, ninety-one thousand, nine hundred six".