3987078 has 16 divisors (see below), whose sum is σ = 8443440. Its totient is φ = 1250816.

The previous prime is 3987077. The next prime is 3987079. The reversal of 3987078 is 8707893.

It is an interprime number because it is at equal distance from previous prime (3987077) and next prime (3987079).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987077) 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, 19443 + ... + 19646.

It is an arithmetic number, because the mean of its divisors is an integer number (527715).

Almost surely, 2^3987078 is an apocalyptic number.

3987078 is an abundant number, since it is smaller than the sum of its proper divisors (4456362).

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

3987078 is a wasteful number, since it uses less digits than its factorization.

3987078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39111.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 3987078 is about 1996.7668867447. The cubic root of 3987078 is about 158.5689841589.

The spelling of 3987078 in words is "three million, nine hundred eighty-seven thousand, seventy-eight".