3921480 has 64 divisors (see below), whose sum is σ = 13075200. Its totient is φ = 1045440.

The previous prime is 3921451. The next prime is 3921497. The reversal of 3921480 is 841293.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (204300).

Almost surely, 2^3921480 is an apocalyptic number.

3921480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3921480 is an abundant number, since it is smaller than the sum of its proper divisors (9153720).

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

3921480 is a wasteful number, since it uses less digits than its factorization.

3921480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3921480 is about 1980.2727084924. The cubic root of 3921480 is about 157.6945441804.

The spelling of 3921480 in words is "three million, nine hundred twenty-one thousand, four hundred eighty".