28530634731 has 4 divisors (see below), whose sum is σ = 38040846312. Its totient is φ = 19020423152.

The previous prime is 28530634711. The next prime is 28530634757. The reversal of 28530634731 is 13743603582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28530634731 - 2⁶ = 28530634667 is a prime.

It is a super-2 number, since 2×28530634731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28530634711) 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, 4755105786 + ... + 4755105791.

It is an arithmetic number, because the mean of its divisors is an integer number (9510211578).

Almost surely, 2^28530634731 is an apocalyptic number.

28530634731 is a deficient number, since it is larger than the sum of its proper divisors (9510211581).

28530634731 is an equidigital number, since it uses as much as digits as its factorization.

28530634731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510211580.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 28530634731 in words is "twenty-eight billion, five hundred thirty million, six hundred thirty-four thousand, seven hundred thirty-one".