28012477031 has 16 divisors (see below), whose sum is σ = 35284704000. Its totient is φ = 21602868480.

The previous prime is 28012477013. The next prime is 28012477079. The reversal of 28012477031 is 13077421082.

It is a cyclic number.

It is not a de Polignac number, because 28012477031 - 2²⁶ = 27945368167 is a prime.

It is a super-2 number, since 2×28012477031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28012476982 and 28012477000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28012477531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867781 + ... + 1882718.

It is an arithmetic number, because the mean of its divisors is an integer number (2205294000).

Almost surely, 2^28012477031 is an apocalyptic number.

28012477031 is a deficient number, since it is larger than the sum of its proper divisors (7272226969).

28012477031 is a wasteful number, since it uses less digits than its factorization.

28012477031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750614.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 28012477031 in words is "twenty-eight billion, twelve million, four hundred seventy-seven thousand, thirty-one".