4038990 has 64 divisors (see below), whose sum is σ = 10340352. Its totient is φ = 1008000.

The previous prime is 4038989. The next prime is 4038997. The reversal of 4038990 is 998304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4038997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39940 + ... + 40040.

It is an arithmetic number, because the mean of its divisors is an integer number (161568).

Almost surely, 2^4038990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4038990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5170176).

4038990 is an abundant number, since it is smaller than the sum of its proper divisors (6301362).

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

4038990 is a wasteful number, since it uses less digits than its factorization.

4038990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 4038990 is about 2009.7238616288. The cubic root of 4038990 is about 159.2542114392.

The spelling of 4038990 in words is "four million, thirty-eight thousand, nine hundred ninety".