28917357040 has 160 divisors (see below), whose sum is σ = 83144678400. Its totient is φ = 9195586560.

The previous prime is 28917356969. The next prime is 28917357071. The reversal of 28917357040 is 4075371982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150841 + ... + 283879.

It is an arithmetic number, because the mean of its divisors is an integer number (519654240).

Almost surely, 2^28917357040 is an apocalyptic number.

28917357040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28917357040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41572339200).

28917357040 is an abundant number, since it is smaller than the sum of its proper divisors (54227321360).

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

28917357040 is a wasteful number, since it uses less digits than its factorization.

28917357040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133095 (or 133089 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 28917357040 in words is "twenty-eight billion, nine hundred seventeen million, three hundred fifty-seven thousand, forty".