28149007509 has 36 divisors (see below), whose sum is σ = 49787375040. Its totient is φ = 15238555920.

The previous prime is 28149007463. The next prime is 28149007577. The reversal of 28149007509 is 90570094182.

It is not a de Polignac number, because 28149007509 - 2⁸ = 28149007253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28149007409) 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 35 ways as a sum of consecutive naturals, for example, 1671357 + ... + 1688114.

It is an arithmetic number, because the mean of its divisors is an integer number (1382982640).

Almost surely, 2^28149007509 is an apocalyptic number.

It is an amenable number.

28149007509 is a deficient number, since it is larger than the sum of its proper divisors (21638367531).

28149007509 is a wasteful number, since it uses less digits than its factorization.

28149007509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359510 (or 3359500 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 28149007509 in words is "twenty-eight billion, one hundred forty-nine million, seven thousand, five hundred nine".