3998436858 has 40 divisors (see below), whose sum is σ = 9648654708. Its totient is φ = 1230287616.

The previous prime is 3998436853. The next prime is 3998436881. The reversal of 3998436858 is 8586348993.

3998436858 is a `hidden beast` number, since 39 + 98 + 436 + 85 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2987387649 + 1011049209 = 54657^2 + 31797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3998436795 and 3998436804.

It is not an unprimeable number, because it can be changed into a prime (3998436853) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 947191 + ... + 951402.

Almost surely, 2^3998436858 is an apocalyptic number.

3998436858 is an abundant number, since it is smaller than the sum of its proper divisors (5650217850).

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

3998436858 is a wasteful number, since it uses less digits than its factorization.

3998436858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898620 (or 1898611 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The square root of 3998436858 is about 63233.1942732613. The cubic root of 3998436858 is about 1587.1942472558.

The spelling of 3998436858 in words is "three billion, nine hundred ninety-eight million, four hundred thirty-six thousand, eight hundred fifty-eight".