28402840686 has 16 divisors (see below), whose sum is σ = 61969834368. Its totient is φ = 8606921400.

The previous prime is 28402840681. The next prime is 28402840703. The reversal of 28402840686 is 68604820482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402840681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215172970 + ... + 215173101.

It is an arithmetic number, because the mean of its divisors is an integer number (3873114648).

Almost surely, 2^28402840686 is an apocalyptic number.

28402840686 is an abundant number, since it is smaller than the sum of its proper divisors (33566993682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28402840686 is a wasteful number, since it uses less digits than its factorization.

28402840686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430346087.

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 28402840686 in words is "twenty-eight billion, four hundred two million, eight hundred forty thousand, six hundred eighty-six".