28439510190 has 128 divisors (see below), whose sum is σ = 86055201792. Its totient is φ = 5854049280.

The previous prime is 28439510161. The next prime is 28439510191. The reversal of 28439510190 is 9101593482.

It is a super-2 number, since 2×28439510190² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28439510191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15112 + ... + 238971.

It is an arithmetic number, because the mean of its divisors is an integer number (672306264).

Almost surely, 2^28439510190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28439510190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43027600896).

28439510190 is an abundant number, since it is smaller than the sum of its proper divisors (57615691602).

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

28439510190 is a wasteful number, since it uses less digits than its factorization.

28439510190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254154.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 28439510190 in words is "twenty-eight billion, four hundred thirty-nine million, five hundred ten thousand, one hundred ninety".