3936389 has 4 divisors (see below), whose sum is σ = 3958560. Its totient is φ = 3914220.

The previous prime is 3936353. The next prime is 3936437. The reversal of 3936389 is 9836393.

3936389 = 50² + 51² + ... + 228².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3936389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3936329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10817 + ... + 11174.

It is an arithmetic number, because the mean of its divisors is an integer number (989640).

Almost surely, 2^3936389 is an apocalyptic number.

It is an amenable number.

3936389 is a deficient number, since it is larger than the sum of its proper divisors (22171).

3936389 is a wasteful number, since it uses less digits than its factorization.

3936389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22170.

The product of its digits is 104976, while the sum is 41.

The square root of 3936389 is about 1984.0335178620. The cubic root of 3936389 is about 157.8941367443.

The spelling of 3936389 in words is "three million, nine hundred thirty-six thousand, three hundred eighty-nine".