3989505 has 32 divisors (see below), whose sum is σ = 7056000. Its totient is φ = 1912320.

The previous prime is 3989477. The next prime is 3989519. The reversal of 3989505 is 5059893.

It is not a de Polignac number, because 3989505 - 2¹² = 3985409 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7746 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (220500).

It is a Proth number, since it is equal to 487 ⋅ 2¹³ + 1 and 487 < 2¹³.

Almost surely, 2^3989505 is an apocalyptic number.

It is an amenable number.

3989505 is a deficient number, since it is larger than the sum of its proper divisors (3066495).

3989505 is a wasteful number, since it uses less digits than its factorization.

3989505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 3989505 is about 1997.3745267225. The cubic root of 3989505 is about 158.6011521495.

The spelling of 3989505 in words is "three million, nine hundred eighty-nine thousand, five hundred five".