28532887397 has 32 divisors (see below), whose sum is σ = 35100011520. Its totient is φ = 22637387520.

The previous prime is 28532887367. The next prime is 28532887421. The reversal of 28532887397 is 79378823582.

It is a cyclic number.

It is not a de Polignac number, because 28532887397 - 2⁶ = 28532887333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532887367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5506754 + ... + 5511932.

It is an arithmetic number, because the mean of its divisors is an integer number (1096875360).

Almost surely, 2^28532887397 is an apocalyptic number.

It is an amenable number.

28532887397 is a deficient number, since it is larger than the sum of its proper divisors (6567124123).

28532887397 is a wasteful number, since it uses less digits than its factorization.

28532887397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961.

The product of its digits is 40642560, while the sum is 62.

The spelling of 28532887397 in words is "twenty-eight billion, five hundred thirty-two million, eight hundred eighty-seven thousand, three hundred ninety-seven".