28019130540 has 24 divisors (see below), whose sum is σ = 78453565680. Its totient is φ = 7471768128.

The previous prime is 28019130527. The next prime is 28019130547. The reversal of 28019130540 is 4503191082.

It is not an unprimeable number, because it can be changed into a prime (28019130547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233492695 + ... + 233492814.

It is an arithmetic number, because the mean of its divisors is an integer number (3268898570).

Almost surely, 2^28019130540 is an apocalyptic number.

28019130540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28019130540 is an abundant number, since it is smaller than the sum of its proper divisors (50434435140).

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

28019130540 is a wasteful number, since it uses less digits than its factorization.

28019130540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466985521 (or 466985519 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 28019130540 in words is "twenty-eight billion, nineteen million, one hundred thirty thousand, five hundred forty".