3940657 has 8 divisors (see below), whose sum is σ = 4740800. Its totient is φ = 3199824.

The previous prime is 3940637. The next prime is 3940663. The reversal of 3940657 is 7560493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3940657 - 2¹¹ = 3938609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3940637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14682 + ... + 14947.

It is an arithmetic number, because the mean of its divisors is an integer number (592600).

Almost surely, 2^3940657 is an apocalyptic number.

It is an amenable number.

3940657 is a deficient number, since it is larger than the sum of its proper divisors (800143).

3940657 is a wasteful number, since it uses less digits than its factorization.

3940657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29655.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 3940657 is about 1985.1088131385. The cubic root of 3940657 is about 157.9511813071.

The spelling of 3940657 in words is "three million, nine hundred forty thousand, six hundred fifty-seven".