28187017061 has 16 divisors (see below), whose sum is σ = 33116135808. Its totient is φ = 23487667200.

The previous prime is 28187017031. The next prime is 28187017091. The reversal of 28187017061 is 16071078182.

It is an interprime number because it is at equal distance from previous prime (28187017031) and next prime (28187017091).

It is a cyclic number.

It is not a de Polignac number, because 28187017061 - 2²² = 28182822757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28187017031) 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, 92300 + ... + 254741.

It is an arithmetic number, because the mean of its divisors is an integer number (2069758488).

Almost surely, 2^28187017061 is an apocalyptic number.

It is an amenable number.

28187017061 is a deficient number, since it is larger than the sum of its proper divisors (4929118747).

28187017061 is a wasteful number, since it uses less digits than its factorization.

28187017061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347372.

The product of its (nonzero) digits is 37632, while the sum is 41.

The spelling of 28187017061 in words is "twenty-eight billion, one hundred eighty-seven million, seventeen thousand, sixty-one".