28531457365 has 16 divisors (see below), whose sum is σ = 34432473600. Its totient is φ = 22695596352.

The previous prime is 28531457363. The next prime is 28531457371. The reversal of 28531457365 is 56375413582.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28531457365 - 2¹ = 28531457363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531457363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942891 + ... + 972679.

It is an arithmetic number, because the mean of its divisors is an integer number (2152029600).

Almost surely, 2^28531457365 is an apocalyptic number.

It is an amenable number.

28531457365 is a deficient number, since it is larger than the sum of its proper divisors (5901016235).

28531457365 is a wasteful number, since it uses less digits than its factorization.

28531457365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30876.

The product of its digits is 3024000, while the sum is 49.

The spelling of 28531457365 in words is "twenty-eight billion, five hundred thirty-one million, four hundred fifty-seven thousand, three hundred sixty-five".