12028731 has 24 divisors (see below), whose sum is σ = 18992400. Its totient is φ = 6726720.

The previous prime is 12028699. The next prime is 12028739. The reversal of 12028731 is 13782021.

It is not a de Polignac number, because 12028731 - 2⁵ = 12028699 is a prime.

It is a super-2 number, since 2×12028731² = 289380738940722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12028739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3445 + ... + 5993.

It is an arithmetic number, because the mean of its divisors is an integer number (791350).

Almost surely, 2^12028731 is an apocalyptic number.

12028731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12028731 is a deficient number, since it is larger than the sum of its proper divisors (6963669).

12028731 is a wasteful number, since it uses less digits than its factorization.

12028731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12028731 is about 3468.2460985345. The cubic root of 12028731 is about 229.1254183538.

The spelling of 12028731 in words is "twelve million, twenty-eight thousand, seven hundred thirty-one".