617488728 has 64 divisors (see below), whose sum is σ = 1614850560. Its totient is φ = 196390656.

The previous prime is 617488691. The next prime is 617488763. The reversal of 617488728 is 827884716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267676 + ... + 269972.

It is an arithmetic number, because the mean of its divisors is an integer number (25232040).

Almost surely, 2^617488728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617488728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807425280).

617488728 is an abundant number, since it is smaller than the sum of its proper divisors (997361832).

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

617488728 is a wasteful number, since it uses less digits than its factorization.

617488728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2812 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 617488728 is about 24849.3204736065. The cubic root of 617488728 is about 851.5490681761.

The spelling of 617488728 in words is "six hundred seventeen million, four hundred eighty-eight thousand, seven hundred twenty-eight".