28247088331 has 24 divisors (see below), whose sum is σ = 36085432320. Its totient is φ = 21637616880.

The previous prime is 28247088319. The next prime is 28247088391. The reversal of 28247088331 is 13388074282.

It is a de Polignac number, because none of the positive numbers 2^k-28247088331 is a prime.

It is a super-2 number, since 2×28247088331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28247088301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232651 + ... + 332596.

It is an arithmetic number, because the mean of its divisors is an integer number (1503559680).

Almost surely, 2^28247088331 is an apocalyptic number.

28247088331 is a deficient number, since it is larger than the sum of its proper divisors (7838343989).

28247088331 is a wasteful number, since it uses less digits than its factorization.

28247088331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565335 (or 565324 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 28247088331 in words is "twenty-eight billion, two hundred forty-seven million, eighty-eight thousand, three hundred thirty-one".