3897520 has 80 divisors (see below), whose sum is σ = 10213632. Its totient is φ = 1370880.

The previous prime is 3897499. The next prime is 3897521. The reversal of 3897520 is 257983.

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

It is not an unprimeable number, because it can be changed into a prime (3897521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37789 + ... + 37891.

Almost surely, 2^3897520 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 3897520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5106816).

3897520 is an abundant number, since it is smaller than the sum of its proper divisors (6316112).

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

3897520 is a wasteful number, since it uses less digits than its factorization.

3897520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 3897520 is about 1974.2137675541. The cubic root of 3897520 is about 157.3727198784.

The spelling of 3897520 in words is "three million, eight hundred ninety-seven thousand, five hundred twenty".