28696589940 has 96 divisors (see below), whose sum is σ = 80779628160. Its totient is φ = 7611659776.

The previous prime is 28696589939. The next prime is 28696589947. The reversal of 28696589940 is 4998569682.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28696589947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11583982 + ... + 11586458.

It is an arithmetic number, because the mean of its divisors is an integer number (841454460).

Almost surely, 2^28696589940 is an apocalyptic number.

28696589940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28696589940 is an abundant number, since it is smaller than the sum of its proper divisors (52083038220).

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

28696589940 is a wasteful number, since it uses less digits than its factorization.

28696589940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 28696589940 in words is "twenty-eight billion, six hundred ninety-six million, five hundred eighty-nine thousand, nine hundred forty".