3987615 has 8 divisors (see below), whose sum is σ = 6380208. Its totient is φ = 2126720.

The previous prime is 3987593. The next prime is 3987629. The reversal of 3987615 is 5167893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3987615 - 2⁶ = 3987551 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132906 + ... + 132935.

It is an arithmetic number, because the mean of its divisors is an integer number (797526).

Almost surely, 2^3987615 is an apocalyptic number.

3987615 is a deficient number, since it is larger than the sum of its proper divisors (2392593).

3987615 is a wasteful number, since it uses less digits than its factorization.

3987615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265849.

The product of its digits is 45360, while the sum is 39.

The square root of 3987615 is about 1996.9013495914. The cubic root of 3987615 is about 158.5761027991.

It can be divided in two parts, 3987 and 615, that multiplied together give a triangular number (2452005 = T₂₂₁₄).

The spelling of 3987615 in words is "three million, nine hundred eighty-seven thousand, six hundred fifteen".