28928041381 has 12 divisors (see below), whose sum is σ = 31118797120. Its totient is φ = 26881732800.

The previous prime is 28928041379. The next prime is 28928041393. The reversal of 28928041381 is 18314082982.

It is not a de Polignac number, because 28928041381 - 2¹ = 28928041379 is a prime.

It is a super-2 number, since 2×28928041381² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928051381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610695 + ... + 656356.

Almost surely, 2^28928041381 is an apocalyptic number.

It is an amenable number.

28928041381 is a deficient number, since it is larger than the sum of its proper divisors (2190755739).

28928041381 is a wasteful number, since it uses less digits than its factorization.

28928041381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267164 (or 1267147 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 28928041381 in words is "twenty-eight billion, nine hundred twenty-eight million, forty-one thousand, three hundred eighty-one".