3621040 has 20 divisors (see below), whose sum is σ = 8419104. Its totient is φ = 1448384.

The previous prime is 3621031. The next prime is 3621043. The reversal of 3621040 is 401263.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×3621040² = 26223861363200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (3621043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22552 + ... + 22711.

Almost surely, 2^3621040 is an apocalyptic number.

It is an amenable number.

3621040 is an abundant number, since it is smaller than the sum of its proper divisors (4798064).

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

3621040 is a wasteful number, since it uses less digits than its factorization.

3621040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45276 (or 45270 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3621040 is about 1902.9030453494. The cubic root of 3621040 is about 153.5598835484.

The spelling of 3621040 in words is "three million, six hundred twenty-one thousand, forty".