3988290 has 32 divisors (see below), whose sum is σ = 10077120. Its totient is φ = 1007424.

The previous prime is 3988289. The next prime is 3988291. The reversal of 3988290 is 928893.

It is an interprime number because it is at equal distance from previous prime (3988289) and next prime (3988291).

It is not an unprimeable number, because it can be changed into a prime (3988291) 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, 2929 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (314910).

Almost surely, 2^3988290 is an apocalyptic number.

3988290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3988290 is an abundant number, since it is smaller than the sum of its proper divisors (6088830).

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

3988290 is a wasteful number, since it uses less digits than its factorization.

3988290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 3988290 is about 1997.0703542940. The cubic root of 3988290 is about 158.5850499041.

It can be divided in two parts, 3988 and 290, that added together give a triangular number (4278 = T₉₂).

The spelling of 3988290 in words is "three million, nine hundred eighty-eight thousand, two hundred ninety".