3815985400 has 24 divisors (see below), whose sum is σ = 8872166520. Its totient is φ = 1526394080.

The previous prime is 3815985391. The next prime is 3815985401. The reversal of 3815985400 is 45895183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3815985401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9539764 + ... + 9540163.

It is an arithmetic number, because the mean of its divisors is an integer number (369673605).

Almost surely, 2^3815985400 is an apocalyptic number.

It is an amenable number.

3815985400 is an abundant number, since it is smaller than the sum of its proper divisors (5056181120).

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

3815985400 is a wasteful number, since it uses less digits than its factorization.

3815985400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19079943 (or 19079934 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 3815985400 is about 61773.6626726957. The cubic root of 3815985400 is about 1562.6758534876.

The spelling of 3815985400 in words is "three billion, eight hundred fifteen million, nine hundred eighty-five thousand, four hundred".