3928988 has 12 divisors (see below), whose sum is σ = 7858032. Its totient is φ = 1683840.

The previous prime is 3928979. The next prime is 3928997. The reversal of 3928988 is 8898293.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3928979) and next prime (3928997).

3928988 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70133 + ... + 70188.

It is an arithmetic number, because the mean of its divisors is an integer number (654836).

Almost surely, 2^3928988 is an apocalyptic number.

It is an amenable number.

3928988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3928988 is a wasteful number, since it uses less digits than its factorization.

3928988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140332 (or 140330 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The square root of 3928988 is about 1982.1675004903. The cubic root of 3928988 is about 157.7951197995.

The spelling of 3928988 in words is "three million, nine hundred twenty-eight thousand, nine hundred eighty-eight".