28121852 has 36 divisors (see below), whose sum is σ = 54742800. Its totient is φ = 12629760.

The previous prime is 28121827. The next prime is 28121857. The reversal of 28121852 is 25812182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28121857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46649 + ... + 47247.

Almost surely, 2^28121852 is an apocalyptic number.

28121852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28121852 is a deficient number, since it is larger than the sum of its proper divisors (26620948).

28121852 is a wasteful number, since it uses less digits than its factorization.

28121852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 709 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 28121852 is about 5303.0040543073. The cubic root of 28121852 is about 304.0987531201.

It can be divided in two parts, 2812 and 1852, that added together give a palindrome (4664).

The spelling of 28121852 in words is "twenty-eight million, one hundred twenty-one thousand, eight hundred fifty-two".