3988439 has 16 divisors (see below), whose sum is σ = 5033280. Its totient is φ = 3075840.

The previous prime is 3988433. The next prime is 3988441. The reversal of 3988439 is 9348893.

3988439 = T₂₈₀ + T₂₈₁ + ... + T₃₅₇.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988439 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 3988439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988433) 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, 3197 + ... + 4265.

It is an arithmetic number, because the mean of its divisors is an integer number (314580).

Almost surely, 2^3988439 is an apocalyptic number.

3988439 is a deficient number, since it is larger than the sum of its proper divisors (1044841).

3988439 is a wasteful number, since it uses less digits than its factorization.

3988439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its digits is 186624, while the sum is 44.

The square root of 3988439 is about 1997.1076585903. The cubic root of 3988439 is about 158.5870247587.

The spelling of 3988439 in words is "three million, nine hundred eighty-eight thousand, four hundred thirty-nine".