28081831602 has 32 divisors (see below), whose sum is σ = 62763833664. Its totient is φ = 8302092800.

The previous prime is 28081831579. The next prime is 28081831607. The reversal of 28081831602 is 20613818082.

It is a super-2 number, since 2×28081831602² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28081831607) 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, 5186103 + ... + 5191514.

It is an arithmetic number, because the mean of its divisors is an integer number (1961369802).

Almost surely, 2^28081831602 is an apocalyptic number.

28081831602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28081831602 is an abundant number, since it is smaller than the sum of its proper divisors (34682002062).

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

28081831602 is a wasteful number, since it uses less digits than its factorization.

28081831602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377674.

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 28081831602 in words is "twenty-eight billion, eighty-one million, eight hundred thirty-one thousand, six hundred two".