28081002 has 16 divisors (see below), whose sum is σ = 57680352. Its totient is φ = 9107280.

The previous prime is 28080979. The next prime is 28081007. The reversal of 28081002 is 20018082.

It is a self number, because there is not a number n which added to its sum of digits gives 28081002.

It is not an unprimeable number, because it can be changed into a prime (28081007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63024 + ... + 63467.

It is an arithmetic number, because the mean of its divisors is an integer number (3605022).

Almost surely, 2^28081002 is an apocalyptic number.

28081002 is an abundant number, since it is smaller than the sum of its proper divisors (29599350).

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

28081002 is a wasteful number, since it uses less digits than its factorization.

28081002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126533.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28081002 is about 5299.1510640856. The cubic root of 28081002 is about 303.9514364368.

Adding to 28081002 its reverse (20018082), we get a palindrome (48099084).

The spelling of 28081002 in words is "twenty-eight million, eighty-one thousand, two".