28081138002 has 8 divisors (see below), whose sum is σ = 56162276016. Its totient is φ = 9360379332.

The previous prime is 28081137967. The next prime is 28081138013. The reversal of 28081138002 is 20083118082.

It is a sphenic number, since it is the product of 3 distinct primes.

28081138002 is an admirable number.

It is a super-2 number, since 2×28081138002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340094828 + ... + 2340094839.

It is an arithmetic number, because the mean of its divisors is an integer number (7020284502).

Almost surely, 2^28081138002 is an apocalyptic number.

28081138002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28081138002 is a wasteful number, since it uses less digits than its factorization.

28081138002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680189672.

The product of its (nonzero) digits is 6144, while the sum is 33.

It can be divided in two parts, 280811 and 38002, that added together give a palindrome (318813).

The spelling of 28081138002 in words is "twenty-eight billion, eighty-one million, one hundred thirty-eight thousand, two".