9998415 has 24 divisors (see below), whose sum is σ = 19807008. Its totient is φ = 4570560.

The previous prime is 9998413. The next prime is 9998423. The reversal of 9998415 is 5148999.

It is not a de Polignac number, because 9998415 - 2¹ = 9998413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

9998415 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15556 + ... + 16185.

It is an arithmetic number, because the mean of its divisors is an integer number (825292).

Almost surely, 2^9998415 is an apocalyptic number.

9998415 is a deficient number, since it is larger than the sum of its proper divisors (9808593).

9998415 is a wasteful number, since it uses less digits than its factorization.

9998415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31759 (or 31756 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 9998415 is about 3162.0270397326. The cubic root of 9998415 is about 215.4320858051.

It can be divided in two parts, 99984 and 15, that added together give a palindrome (99999).

The spelling of 9998415 in words is "nine million, nine hundred ninety-eight thousand, four hundred fifteen".