647698248 has 64 divisors (see below), whose sum is σ = 1821984000. Its totient is φ = 213160896.

The previous prime is 647698237. The next prime is 647698291. The reversal of 647698248 is 842896746.

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

It is a junction number, because it is equal to n+sod(n) for n = 647698194 and 647698203.

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, 1915 + ... + 36042.

It is an arithmetic number, because the mean of its divisors is an integer number (28468500).

Almost surely, 2^647698248 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 647698248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910992000).

647698248 is an abundant number, since it is smaller than the sum of its proper divisors (1174285752).

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

647698248 is a wasteful number, since it uses less digits than its factorization.

647698248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38051 (or 38041 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 647698248 is about 25449.9164635171. The cubic root of 647698248 is about 865.2153998194.

The spelling of 647698248 in words is "six hundred forty-seven million, six hundred ninety-eight thousand, two hundred forty-eight".