28434182728 has 32 divisors (see below), whose sum is σ = 64514534400. Its totient is φ = 11469249792.

The previous prime is 28434182719. The next prime is 28434182753. The reversal of 28434182728 is 82728143482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14932968 + ... + 14934871.

It is an arithmetic number, because the mean of its divisors is an integer number (2016079200).

Almost surely, 2^28434182728 is an apocalyptic number.

28434182728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28434182728 is an abundant number, since it is smaller than the sum of its proper divisors (36080351672).

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

28434182728 is a wasteful number, since it uses less digits than its factorization.

28434182728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29867869 (or 29867865 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 49.

The spelling of 28434182728 in words is "twenty-eight billion, four hundred thirty-four million, one hundred eighty-two thousand, seven hundred twenty-eight".