28158082428 has 96 divisors (see below), whose sum is σ = 75468072960. Its totient is φ = 8004588480.

The previous prime is 28158082427. The next prime is 28158082453. The reversal of 28158082428 is 82428085182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28158082427) 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, 17922883 + ... + 17924453.

It is an arithmetic number, because the mean of its divisors is an integer number (786125760).

Almost surely, 2^28158082428 is an apocalyptic number.

28158082428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28158082428 is an abundant number, since it is smaller than the sum of its proper divisors (47309990532).

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

28158082428 is a wasteful number, since it uses less digits than its factorization.

28158082428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 48.

The spelling of 28158082428 in words is "twenty-eight billion, one hundred fifty-eight million, eighty-two thousand, four hundred twenty-eight".