3921330 has 64 divisors (see below), whose sum is σ = 10948608. Its totient is φ = 880320.

The previous prime is 3921301. The next prime is 3921343. The reversal of 3921330 is 331293.

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

It is a junction number, because it is equal to n+sod(n) for n = 3921297 and 3921306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14779 + ... + 15041.

It is an arithmetic number, because the mean of its divisors is an integer number (171072).

Almost surely, 2^3921330 is an apocalyptic number.

3921330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5474304).

3921330 is an abundant number, since it is smaller than the sum of its proper divisors (7027278).

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

3921330 is a wasteful number, since it uses less digits than its factorization.

3921330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 3921330 is about 1980.2348345588. The cubic root of 3921330 is about 157.6925335038.

The spelling of 3921330 in words is "three million, nine hundred twenty-one thousand, three hundred thirty".