28132521007 has 8 divisors (see below), whose sum is σ = 28503755280. Its totient is φ = 27763344000.

The previous prime is 28132520989. The next prime is 28132521013. The reversal of 28132521007 is 70012523182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28132521007 - 2⁷ = 28132520879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28132521007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28132521407) 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 7 ways as a sum of consecutive naturals, for example, 486778 + ... + 541495.

It is an arithmetic number, because the mean of its divisors is an integer number (3562969410).

Almost surely, 2^28132521007 is an apocalyptic number.

28132521007 is a deficient number, since it is larger than the sum of its proper divisors (371234273).

28132521007 is a wasteful number, since it uses less digits than its factorization.

28132521007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028633.

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 28132521007 in words is "twenty-eight billion, one hundred thirty-two million, five hundred twenty-one thousand, seven".