28867532331 has 16 divisors (see below), whose sum is σ = 42700821120. Its totient is φ = 17198939520.

The previous prime is 28867532327. The next prime is 28867532341. The reversal of 28867532331 is 13323576882.

It is not a de Polignac number, because 28867532331 - 2² = 28867532327 is a prime.

It is a super-2 number, since 2×28867532331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28867532311) 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, 7411390 + ... + 7415283.

It is an arithmetic number, because the mean of its divisors is an integer number (2668801320).

Almost surely, 2^28867532331 is an apocalyptic number.

28867532331 is a deficient number, since it is larger than the sum of its proper divisors (13833288789).

28867532331 is a wasteful number, since it uses less digits than its factorization.

28867532331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14826746.

The product of its digits is 1451520, while the sum is 48.

The spelling of 28867532331 in words is "twenty-eight billion, eight hundred sixty-seven million, five hundred thirty-two thousand, three hundred thirty-one".