3985740 has 144 divisors (see below), whose sum is σ = 13853280. Its totient is φ = 950400.

The previous prime is 3985721. The next prime is 3985777. The reversal of 3985740 is 475893.

3985740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3985740² = 31772246695200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3985695 and 3985704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65310 + ... + 65370.

Almost surely, 2^3985740 is an apocalyptic number.

3985740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3985740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6926640).

3985740 is an abundant number, since it is smaller than the sum of its proper divisors (9867540).

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

3985740 is a wasteful number, since it uses less digits than its factorization.

3985740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 3985740 is about 1996.4318170176. The cubic root of 3985740 is about 158.5512444308.

The spelling of 3985740 in words is "three million, nine hundred eighty-five thousand, seven hundred forty".