398217913250 has 32 divisors (see below), whose sum is σ = 749326531824. Its totient is φ = 158461824000.

The previous prime is 398217913237. The next prime is 398217913267. The reversal of 398217913250 is 52319712893.

It can be written as a sum of positive squares in 8 ways, for example, as 1263731401 + 396954181849 = 35549^2 + 630043^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 4078361 + ... + 4174860.

Almost surely, 2^398217913250 is an apocalyptic number.

398217913250 is a deficient number, since it is larger than the sum of its proper divisors (351108618574).

398217913250 is a wasteful number, since it uses less digits than its factorization.

398217913250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253431 (or 8253421 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 398217913250 in words is "three hundred ninety-eight billion, two hundred seventeen million, nine hundred thirteen thousand, two hundred fifty".