28691892 has 36 divisors (see below), whose sum is σ = 72866976. Its totient is φ = 9519120.

The previous prime is 28691891. The next prime is 28691893. The reversal of 28691892 is 29819682.

It is an interprime number because it is at equal distance from previous prime (28691891) and next prime (28691893).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28691891) 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, 6417 + ... + 9927.

Almost surely, 2^28691892 is an apocalyptic number.

It is an amenable number.

28691892 is an abundant number, since it is smaller than the sum of its proper divisors (44175084).

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

28691892 is a wasteful number, since it uses less digits than its factorization.

28691892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748 (or 3743 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 28691892 is about 5356.4813077243. The cubic root of 28691892 is about 306.1397541814.

It can be divided in two parts, 2869 and 1892, that added together give a square (4761 = 69²).

The spelling of 28691892 in words is "twenty-eight million, six hundred ninety-one thousand, eight hundred ninety-two".