4031328 has 72 divisors (see below), whose sum is σ = 12324312. Its totient is φ = 1150464.

The previous prime is 4031327. The next prime is 4031347. The reversal of 4031328 is 8231304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4276 + ... + 5132.

It is an arithmetic number, because the mean of its divisors is an integer number (171171).

Almost surely, 2^4031328 is an apocalyptic number.

4031328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4031328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6162156).

4031328 is an abundant number, since it is smaller than the sum of its proper divisors (8292984).

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

4031328 is a wasteful number, since it uses less digits than its factorization.

4031328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4031328 is about 2007.8167247037. The cubic root of 4031328 is about 159.1534454752.

The spelling of 4031328 in words is "four million, thirty-one thousand, three hundred twenty-eight".