28540309037 has 4 divisors (see below), whose sum is σ = 28817399520. Its totient is φ = 28263218556.

The previous prime is 28540308997. The next prime is 28540309043. The reversal of 28540309037 is 73090304582.

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 28540309037 - 2¹⁸ = 28540046893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28540308985 and 28540309003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28540309097) 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, 138545087 + ... + 138545292.

It is an arithmetic number, because the mean of its divisors is an integer number (7204349880).

Almost surely, 2^28540309037 is an apocalyptic number.

It is an amenable number.

28540309037 is a deficient number, since it is larger than the sum of its proper divisors (277090483).

28540309037 is a wasteful number, since it uses less digits than its factorization.

28540309037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277090482.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 28540309037 in words is "twenty-eight billion, five hundred forty million, three hundred nine thousand, thirty-seven".