28437940674 has 128 divisors (see below), whose sum is σ = 74502892800. Its totient is φ = 7926888960.

The previous prime is 28437940637. The next prime is 28437940691. The reversal of 28437940674 is 47604973482.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 28437940674.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2256262 + ... + 2268830.

It is an arithmetic number, because the mean of its divisors is an integer number (582053850).

Almost surely, 2^28437940674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28437940674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37251446400).

28437940674 is an abundant number, since it is smaller than the sum of its proper divisors (46064952126).

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

28437940674 is a wasteful number, since it uses less digits than its factorization.

28437940674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12897 (or 12891 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 28437940674 in words is "twenty-eight billion, four hundred thirty-seven million, nine hundred forty thousand, six hundred seventy-four".