12005890 has 16 divisors (see below), whose sum is σ = 23273208. Its totient is φ = 4432896.

The previous prime is 12005881. The next prime is 12005909. The reversal of 12005890 is 9850021.

It can be written as a sum of positive squares in 4 ways, for example, as 8277129 + 3728761 = 2877^2 + 1931^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46047 + ... + 46306.

Almost surely, 2^12005890 is an apocalyptic number.

12005890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12005890 is a deficient number, since it is larger than the sum of its proper divisors (11267318).

12005890 is a wasteful number, since it uses less digits than its factorization.

12005890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92373.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 12005890 is about 3464.9516591145. The cubic root of 12005890 is about 228.9802999777.

The spelling of 12005890 in words is "twelve million, five thousand, eight hundred ninety".