3985405140 has 48 divisors (see below), whose sum is σ = 11244340800. Its totient is φ = 1054659840.

The previous prime is 3985405133. The next prime is 3985405159. The reversal of 3985405140 is 415045893.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 245665 + ... + 261384.

It is an arithmetic number, because the mean of its divisors is an integer number (234257100).

Almost surely, 2^3985405140 is an apocalyptic number.

3985405140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3985405140 is an abundant number, since it is smaller than the sum of its proper divisors (7258935660).

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

3985405140 is a wasteful number, since it uses less digits than its factorization.

3985405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507192 (or 507190 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 3985405140 is about 63130.0652621237. The cubic root of 3985405140 is about 1585.4680410467.

The spelling of 3985405140 in words is "three billion, nine hundred eighty-five million, four hundred five thousand, one hundred forty".