3921828 has 48 divisors (see below), whose sum is σ = 9784320. Its totient is φ = 1219104.

The previous prime is 3921823. The next prime is 3921851. The reversal of 3921828 is 8281293.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3921823) 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, 23401 + ... + 23567.

It is an arithmetic number, because the mean of its divisors is an integer number (203840).

Almost surely, 2^3921828 is an apocalyptic number.

3921828 is a gapful number since it is divisible by the number (38) 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 3921828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4892160).

3921828 is an abundant number, since it is smaller than the sum of its proper divisors (5862492).

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

3921828 is a wasteful number, since it uses less digits than its factorization.

3921828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 294 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 3921828 is about 1980.3605732290. The cubic root of 3921828 is about 157.6992087524.

The spelling of 3921828 in words is "three million, nine hundred twenty-one thousand, eight hundred twenty-eight".