28687692 has 48 divisors (see below), whose sum is σ = 74075904. Its totient is φ = 8568000.

The previous prime is 28687667. The next prime is 28687697. The reversal of 28687692 is 29678682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28687697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7842 + ... + 10902.

It is an arithmetic number, because the mean of its divisors is an integer number (1543248).

Almost surely, 2^28687692 is an apocalyptic number.

28687692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28687692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37037952).

28687692 is an abundant number, since it is smaller than the sum of its proper divisors (45388212).

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

28687692 is a wasteful number, since it uses less digits than its factorization.

28687692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3148 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 28687692 is about 5356.0892449622. The cubic root of 28687692 is about 306.1248155859.

It can be divided in two parts, 286 and 87692, that added together give a palindrome (87978).

The spelling of 28687692 in words is "twenty-eight million, six hundred eighty-seven thousand, six hundred ninety-two".