3948987 has 16 divisors (see below), whose sum is σ = 6147072. Its totient is φ = 2208000.

The previous prime is 3948953. The next prime is 3949003. The reversal of 3948987 is 7898493.

It is not a de Polignac number, because 3948987 - 2⁷ = 3948859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3948907) 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, 1014 + ... + 2987.

It is an arithmetic number, because the mean of its divisors is an integer number (384192).

Almost surely, 2^3948987 is an apocalyptic number.

3948987 is a deficient number, since it is larger than the sum of its proper divisors (2198085).

3948987 is a wasteful number, since it uses less digits than its factorization.

3948987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058.

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

The square root of 3948987 is about 1987.2058272861. The cubic root of 3948987 is about 158.0623985766.

It can be divided in two parts, 3948 and 987, that multiplied together give a square (3896676 = 1974²).

The spelling of 3948987 in words is "three million, nine hundred forty-eight thousand, nine hundred eighty-seven".