3899520 has 96 divisors (see below), whose sum is σ = 13485420. Its totient is φ = 1038336.

The previous prime is 3899513. The next prime is 3899527. The reversal of 3899520 is 259983.

It is an interprime number because it is at equal distance from previous prime (3899513) and next prime (3899527).

It can be written as a sum of positive squares in 2 ways, for example, as 3594816 + 304704 = 1896^2 + 552^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3899527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5422 + ... + 6098.

Almost surely, 2^3899520 is an apocalyptic number.

3899520 is a gapful number since it is divisible by the number (30) 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 3899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6742710).

3899520 is an abundant number, since it is smaller than the sum of its proper divisors (9585900).

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

3899520 is a wasteful number, since it uses less digits than its factorization.

3899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 3899520 is about 1974.7202333495. The cubic root of 3899520 is about 157.3996337124.

The spelling of 3899520 in words is "three million, eight hundred ninety-nine thousand, five hundred twenty".