405198898 has 8 divisors (see below), whose sum is σ = 654552108. Its totient is φ = 187014864.

The previous prime is 405198881. The next prime is 405198901. The reversal of 405198898 is 898891504.

It can be written as a sum of positive squares in 2 ways, for example, as 398681089 + 6517809 = 19967^2 + 2553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×405198898² = 328372293880828808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7792261 + ... + 7792312.

Almost surely, 2^405198898 is an apocalyptic number.

405198898 is a deficient number, since it is larger than the sum of its proper divisors (249353210).

405198898 is a wasteful number, since it uses less digits than its factorization.

405198898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15584588.

The product of its (nonzero) digits is 829440, while the sum is 52.

The square root of 405198898 is about 20129.5528514669. The cubic root of 405198898 is about 739.9847196747.

The spelling of 405198898 in words is "four hundred five million, one hundred ninety-eight thousand, eight hundred ninety-eight".