3641520 has 40 divisors (see below), whose sum is σ = 11289456. Its totient is φ = 971008.

The previous prime is 3641509. The next prime is 3641537. The reversal of 3641520 is 251463.

It is a happy number.

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, 7347 + ... + 7826.

Almost surely, 2^3641520 is an apocalyptic number.

3641520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3641520 is an abundant number, since it is smaller than the sum of its proper divisors (7647936).

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

3641520 is a wasteful number, since it uses less digits than its factorization.

3641520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189 (or 15183 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3641520 is about 1908.2767094947. The cubic root of 3641520 is about 153.8488425171.

Adding to 3641520 its reverse (251463), we get a palindrome (3892983).

The spelling of 3641520 in words is "three million, six hundred forty-one thousand, five hundred twenty".