28265884031 has 32 divisors (see below), whose sum is σ = 35452505088. Its totient is φ = 21893264640.

The previous prime is 28265884019. The next prime is 28265884091. The reversal of 28265884031 is 13048856282.

It is a cyclic number.

It is not a de Polignac number, because 28265884031 - 2³⁴ = 11086014847 is a prime.

It is a super-2 number, since 2×28265884031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28265884091) 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, 15302750 + ... + 15304596.

It is an arithmetic number, because the mean of its divisors is an integer number (1107890784).

Almost surely, 2^28265884031 is an apocalyptic number.

28265884031 is a deficient number, since it is larger than the sum of its proper divisors (7186621057).

28265884031 is a wasteful number, since it uses less digits than its factorization.

28265884031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 28265884031 in words is "twenty-eight billion, two hundred sixty-five million, eight hundred eighty-four thousand, thirty-one".