28208533031 has 16 divisors (see below), whose sum is σ = 32422934016. Its totient is φ = 24040445856.

The previous prime is 28208533021. The next prime is 28208533033. The reversal of 28208533031 is 13033580282.

It is not a de Polignac number, because 28208533031 - 2²² = 28204338727 is a prime.

It is a super-2 number, since 2×28208533031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28208532982 and 28208533000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208533033) 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, 2458550 + ... + 2469996.

It is an arithmetic number, because the mean of its divisors is an integer number (2026433376).

Almost surely, 2^28208533031 is an apocalyptic number.

28208533031 is a deficient number, since it is larger than the sum of its proper divisors (4214400985).

28208533031 is a wasteful number, since it uses less digits than its factorization.

28208533031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 28208533031 in words is "twenty-eight billion, two hundred eight million, five hundred thirty-three thousand, thirty-one".