3869520 has 80 divisors (see below), whose sum is σ = 12534912. Its totient is φ = 985600.

The previous prime is 3869501. The next prime is 3869561. The reversal of 3869520 is 259683.

3869520 = T₃₉₂ + T₃₉₃ + ... + T₄₃₆.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 5170 + ... + 5870.

Almost surely, 2^3869520 is an apocalyptic number.

3869520 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 3869520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6267456).

3869520 is an abundant number, since it is smaller than the sum of its proper divisors (8665392).

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

3869520 is a wasteful number, since it uses less digits than its factorization.

3869520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 3869520 is about 1967.1095546512. The cubic root of 3869520 is about 156.9949556847.

The spelling of 3869520 in words is "three million, eight hundred sixty-nine thousand, five hundred twenty".