28408726854 has 12 divisors (see below), whose sum is σ = 61552241556. Its totient is φ = 9469575612.

The previous prime is 28408726847. The next prime is 28408726861. The reversal of 28408726854 is 45862780482.

It is an interprime number because it is at equal distance from previous prime (28408726847) and next prime (28408726861).

It is a super-2 number, since 2×28408726854² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28408726854.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 789131284 + ... + 789131319.

It is an arithmetic number, because the mean of its divisors is an integer number (5129353463).

Almost surely, 2^28408726854 is an apocalyptic number.

28408726854 is an abundant number, since it is smaller than the sum of its proper divisors (33143514702).

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

28408726854 is a wasteful number, since it uses less digits than its factorization.

28408726854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578262611 (or 1578262608 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 54.

The spelling of 28408726854 in words is "twenty-eight billion, four hundred eight million, seven hundred twenty-six thousand, eight hundred fifty-four".