28874411238 has 16 divisors (see below), whose sum is σ = 57776178096. Its totient is φ = 9620244480.

The previous prime is 28874411227. The next prime is 28874411257. The reversal of 28874411238 is 83211447882.

It is a super-2 number, since 2×28874411238² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1126083 + ... + 1151438.

It is an arithmetic number, because the mean of its divisors is an integer number (3611011131).

Almost surely, 2^28874411238 is an apocalyptic number.

28874411238 is an abundant number, since it is smaller than the sum of its proper divisors (28901766858).

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

28874411238 is a wasteful number, since it uses less digits than its factorization.

28874411238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279639.

The product of its digits is 688128, while the sum is 48.

The spelling of 28874411238 in words is "twenty-eight billion, eight hundred seventy-four million, four hundred eleven thousand, two hundred thirty-eight".