28071491960 has 32 divisors (see below), whose sum is σ = 63264965760. Its totient is φ = 11210088576.

The previous prime is 28071491849. The next prime is 28071491963. The reversal of 28071491960 is 6919417082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071491963) by changing a digit.

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, 553799 + ... + 602358.

It is an arithmetic number, because the mean of its divisors is an integer number (1977030180).

Almost surely, 2^28071491960 is an apocalyptic number.

28071491960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28071491960 is an abundant number, since it is smaller than the sum of its proper divisors (35193473800).

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

28071491960 is a wasteful number, since it uses less digits than its factorization.

28071491960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156775 (or 1156771 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 28071491960 in words is "twenty-eight billion, seventy-one million, four hundred ninety-one thousand, nine hundred sixty".