3981530 has 32 divisors (see below), whose sum is σ = 8550144. Its totient is φ = 1305216.

The previous prime is 3981517. The next prime is 3981539. The reversal of 3981530 is 351893.

3981530 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 2×3981530² = 31705162281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3981493 and 3981502.

It is not an unprimeable number, because it can be changed into a prime (3981539) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 374 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (267192).

Almost surely, 2^3981530 is an apocalyptic number.

3981530 is an abundant number, since it is smaller than the sum of its proper divisors (4568614).

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

3981530 is a wasteful number, since it uses less digits than its factorization.

3981530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 3981530 is about 1995.3771573314. The cubic root of 3981530 is about 158.4954006898.

The spelling of 3981530 in words is "three million, nine hundred eighty-one thousand, five hundred thirty".