3915920 has 40 divisors (see below), whose sum is σ = 9404160. Its totient is φ = 1514880.

The previous prime is 3915907. The next prime is 3915931. The reversal of 3915920 is 295193.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691 + ... + 3269.

It is an arithmetic number, because the mean of its divisors is an integer number (235104).

Almost surely, 2^3915920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3915920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4702080).

3915920 is an abundant number, since it is smaller than the sum of its proper divisors (5488240).

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

3915920 is a wasteful number, since it uses less digits than its factorization.

3915920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 3915920 is about 1978.8683634845. The cubic root of 3915920 is about 157.6199808039.

The spelling of 3915920 in words is "three million, nine hundred fifteen thousand, nine hundred twenty".