409698 has 28 divisors (see below), whose sum is σ = 924678. Its totient is φ = 136080.

The previous prime is 409693. The next prime is 409709. The reversal of 409698 is 896904.

It can be written as a sum of positive squares in only one way, i.e., 321489 + 88209 = 567^2 + 297^2 .

It is an Ulam number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (409691) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1318 + ... + 1598.

2⁴⁰⁹⁶⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 409698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462339).

409698 is an abundant number, since it is smaller than the sum of its proper divisors (514980).

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

409698 is an equidigital number, since it uses as much as digits as its factorization.

409698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 409698 is about 640.0765579210. The cubic root of 409698 is about 74.2713437263.

The spelling of 409698 in words is "four hundred nine thousand, six hundred ninety-eight".