4098818 has 4 divisors (see below), whose sum is σ = 6148230. Its totient is φ = 2049408.

The previous prime is 4098817. The next prime is 4098821. The reversal of 4098818 is 8188904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3265249 + 833569 = 1807^2 + 913^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4098817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024703 + ... + 1024706.

Almost surely, 2^4098818 is an apocalyptic number.

4098818 is a deficient number, since it is larger than the sum of its proper divisors (2049412).

4098818 is a wasteful number, since it uses less digits than its factorization.

4098818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049411.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 4098818 is about 2024.5537779965. The cubic root of 4098818 is about 160.0366842968.

The spelling of 4098818 in words is "four million, ninety-eight thousand, eight hundred eighteen".