12023890 has 16 divisors (see below), whose sum is σ = 22228632. Its totient is φ = 4679424.

The previous prime is 12023881. The next prime is 12023909. The reversal of 12023890 is 9832021.

It can be written as a sum of positive squares in 4 ways, for example, as 11978521 + 45369 = 3461^2 + 213^2 .

It is an unprimeable number.

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, 15879 + ... + 16618.

Almost surely, 2^12023890 is an apocalyptic number.

12023890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12023890 is a deficient number, since it is larger than the sum of its proper divisors (10204742).

12023890 is a wasteful number, since it uses less digits than its factorization.

12023890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32541.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12023890 is about 3467.5481251167. The cubic root of 12023890 is about 229.0946768183.

The spelling of 12023890 in words is "twelve million, twenty-three thousand, eight hundred ninety".