398108634 has 216 divisors, whose sum is σ = 1109130624. Its totient is φ = 94802400.

The previous prime is 398108629. The next prime is 398108701. The reversal of 398108634 is 436801893.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 12842199 + ... + 12842229.

It is an arithmetic number, because the mean of its divisors is an integer number (5134864).

Almost surely, 2^398108634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398108634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554565312).

398108634 is an abundant number, since it is smaller than the sum of its proper divisors (711021990).

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

398108634 is a wasteful number, since it uses less digits than its factorization.

398108634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 398108634 is about 19952.6598226903. The cubic root of 398108634 is about 735.6431558683.

The spelling of 398108634 in words is "three hundred ninety-eight million, one hundred eight thousand, six hundred thirty-four".