3989390 has 32 divisors (see below), whose sum is σ = 7858944. Its totient is φ = 1451520.

The previous prime is 3989389. The next prime is 3989393. The reversal of 3989390 is 939893.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4892 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (245592).

Almost surely, 2^3989390 is an apocalyptic number.

3989390 is a deficient number, since it is larger than the sum of its proper divisors (3869554).

3989390 is a wasteful number, since it uses less digits than its factorization.

3989390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 3989390 is about 1997.3457387243. The cubic root of 3989390 is about 158.5996282088.

The spelling of 3989390 in words is "three million, nine hundred eighty-nine thousand, three hundred ninety".