28532207237 has 4 divisors (see below), whose sum is σ = 28533424416. Its totient is φ = 28530990060.

The previous prime is 28532207117. The next prime is 28532207243. The reversal of 28532207237 is 73270223582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28532207237 - 2²⁶ = 28465098373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28532207194 and 28532207203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532207267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572723 + ... + 620544.

It is an arithmetic number, because the mean of its divisors is an integer number (7133356104).

Almost surely, 2^28532207237 is an apocalyptic number.

It is an amenable number.

28532207237 is a deficient number, since it is larger than the sum of its proper divisors (1217179).

28532207237 is a wasteful number, since it uses less digits than its factorization.

28532207237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217178.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 28532207237 in words is "twenty-eight billion, five hundred thirty-two million, two hundred seven thousand, two hundred thirty-seven".