3989478 has 16 divisors (see below), whose sum is σ = 8076096. Its totient is φ = 1313640.

The previous prime is 3989477. The next prime is 3989519. The reversal of 3989478 is 8749893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989471) 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, 3508 + ... + 4503.

It is an arithmetic number, because the mean of its divisors is an integer number (504756).

Almost surely, 2^3989478 is an apocalyptic number.

3989478 is an abundant number, since it is smaller than the sum of its proper divisors (4086618).

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

3989478 is a wasteful number, since it uses less digits than its factorization.

3989478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8099.

The product of its digits is 435456, while the sum is 48.

The square root of 3989478 is about 1997.3677678385. The cubic root of 3989478 is about 158.6007943574.

The spelling of 3989478 in words is "three million, nine hundred eighty-nine thousand, four hundred seventy-eight".