28231287207 has 8 divisors (see below), whose sum is σ = 38258793840. Its totient is φ = 18512319360.

The previous prime is 28231287193. The next prime is 28231287229. The reversal of 28231287207 is 70278213282.

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

It is not a de Polignac number, because 28231287207 - 2⁴ = 28231287191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231287257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77134482 + ... + 77134847.

It is an arithmetic number, because the mean of its divisors is an integer number (4782349230).

Almost surely, 2^28231287207 is an apocalyptic number.

28231287207 is a deficient number, since it is larger than the sum of its proper divisors (10027506633).

28231287207 is a wasteful number, since it uses less digits than its factorization.

28231287207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154269393.

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 28231287207 in words is "twenty-eight billion, two hundred thirty-one million, two hundred eighty-seven thousand, two hundred seven".