28158309000 has 96 divisors (see below), whose sum is σ = 95175114840. Its totient is φ = 7508880000.

The previous prime is 28158308999. The next prime is 28158309007. The reversal of 28158309000 is 90385182.

It can be written as a sum of positive squares in 4 ways, for example, as 1105296516 + 27053012484 = 33246^2 + 164478^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28158309007) 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 23 ways as a sum of consecutive naturals, for example, 1555351 + ... + 1573350.

Almost surely, 2^28158309000 is an apocalyptic number.

28158309000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28158309000 is an abundant number, since it is smaller than the sum of its proper divisors (67016805840).

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

28158309000 is a wasteful number, since it uses less digits than its factorization.

28158309000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128728 (or 3128711 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 28158309000 in words is "twenty-eight billion, one hundred fifty-eight million, three hundred nine thousand".