4078198818 has 24 divisors (see below), whose sum is σ = 8837513100. Its totient is φ = 1359181824.

The previous prime is 4078198781. The next prime is 4078198837. The reversal of 4078198818 is 8188918704.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3603961089 + 474237729 = 60033^2 + 21777^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130018 + ... + 158306.

Almost surely, 2^4078198818 is an apocalyptic number.

4078198818 is an abundant number, since it is smaller than the sum of its proper divisors (4759314282).

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

4078198818 is a wasteful number, since it uses less digits than its factorization.

4078198818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36306 (or 36303 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 54.

The square root of 4078198818 is about 63860.7768352374. The cubic root of 4078198818 is about 1597.6787718263.

It can be divided in two parts, 407 and 8198818, that added together give a triangular number (8199225 = T₄₀₄₉).

The spelling of 4078198818 in words is "four billion, seventy-eight million, one hundred ninety-eight thousand, eight hundred eighteen".