3986028 has 36 divisors (see below), whose sum is σ = 10138128. Its totient is φ = 1320480.

The previous prime is 3986009. The next prime is 3986033. The reversal of 3986028 is 8206893.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3985983 and 3986001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9258 + ... + 9678.

Almost surely, 2^3986028 is an apocalyptic number.

3986028 is the 1263-rd heptagonal number.

It is an amenable number.

3986028 is an abundant number, since it is smaller than the sum of its proper divisors (6152100).

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

3986028 is a wasteful number, since it uses less digits than its factorization.

3986028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 3986028 is about 1996.5039443988. The cubic root of 3986028 is about 158.5550631829. Note that the first 3 decimals are identical.

The spelling of 3986028 in words is "three million, nine hundred eighty-six thousand, twenty-eight".