315128898 has 72 divisors (see below), whose sum is σ = 841014252. Its totient is φ = 84736512.

The previous prime is 315128893. The next prime is 315128899. The reversal of 315128898 is 898821513.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 298702089 + 16426809 = 17283^2 + 4053^2 .

It is not an unprimeable number, because it can be changed into a prime (315128893) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4486 + ... + 25502.

Almost surely, 2^315128898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315128898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420507126).

315128898 is an abundant number, since it is smaller than the sum of its proper divisors (525885354).

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

315128898 is a wasteful number, since it uses less digits than its factorization.

315128898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21056 (or 21046 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 315128898 is about 17751.8702676648. The cubic root of 315128898 is about 680.5020067557.

The spelling of 315128898 in words is "three hundred fifteen million, one hundred twenty-eight thousand, eight hundred ninety-eight".