28687802 has 32 divisors (see below), whose sum is σ = 51940224. Its totient is φ = 11707200.

The previous prime is 28687801. The next prime is 28687807. The reversal of 28687802 is 20878682.

It is a self number, because there is not a number n which added to its sum of digits gives 28687802.

It is not an unprimeable number, because it can be changed into a prime (28687801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9227 + ... + 11937.

It is an arithmetic number, because the mean of its divisors is an integer number (1623132).

Almost surely, 2^28687802 is an apocalyptic number.

28687802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28687802 is a deficient number, since it is larger than the sum of its proper divisors (23252422).

28687802 is a wasteful number, since it uses less digits than its factorization.

28687802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 28687802 is about 5356.0995136386. The cubic root of 28687802 is about 306.1252068534.

It can be divided in two parts, 286 and 87802, that added together give a palindrome (88088).

The spelling of 28687802 in words is "twenty-eight million, six hundred eighty-seven thousand, eight hundred two".