3621404 has 12 divisors (see below), whose sum is σ = 6556200. Its totient is φ = 1748208.

The previous prime is 3621403. The next prime is 3621461. The reversal of 3621404 is 4041263.

It is a happy number.

It is a super-2 number, since 2×3621404² = 26229133862432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621403) 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, 15494 + ... + 15725.

It is an arithmetic number, because the mean of its divisors is an integer number (546350).

Almost surely, 2^3621404 is an apocalyptic number.

It is an amenable number.

3621404 is a deficient number, since it is larger than the sum of its proper divisors (2934796).

3621404 is a wasteful number, since it uses less digits than its factorization.

3621404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31252 (or 31250 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3621404 is about 1902.9986862844. The cubic root of 3621404 is about 153.5650288404.

Adding to 3621404 its reverse (4041263), we get a palindrome (7662667).

The spelling of 3621404 in words is "three million, six hundred twenty-one thousand, four hundred four".