3888990 has 48 divisors (see below), whose sum is σ = 11557728. Its totient is φ = 888768.

The previous prime is 3888967. The next prime is 3888991. The reversal of 3888990 is 998883.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2457 + ... + 3716.

It is an arithmetic number, because the mean of its divisors is an integer number (240786).

Almost surely, 2^3888990 is an apocalyptic number.

3888990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3888990 is an abundant number, since it is smaller than the sum of its proper divisors (7668738).

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

3888990 is a wasteful number, since it uses less digits than its factorization.

3888990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 3888990 is about 1972.0522305456. The cubic root of 3888990 is about 157.2578288881.

The spelling of 3888990 in words is "three million, eight hundred eighty-eight thousand, nine hundred ninety".