3957690 has 64 divisors (see below), whose sum is σ = 10575360. Its totient is φ = 939840.

The previous prime is 3957683. The next prime is 3957691. The reversal of 3957690 is 967593.

It is a super-2 number, since 2×3957690² = 31326620272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3957691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22021 + ... + 22199.

It is an arithmetic number, because the mean of its divisors is an integer number (165240).

Almost surely, 2^3957690 is an apocalyptic number.

3957690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3957690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5287680).

3957690 is an abundant number, since it is smaller than the sum of its proper divisors (6617670).

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

3957690 is a wasteful number, since it uses less digits than its factorization.

3957690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 3957690 is about 1989.3943802072. The cubic root of 3957690 is about 158.1784289861.

The spelling of 3957690 in words is "three million, nine hundred fifty-seven thousand, six hundred ninety".