3651404 has 6 divisors (see below), whose sum is σ = 6389964. Its totient is φ = 1825700.

The previous prime is 3651341. The next prime is 3651407. The reversal of 3651404 is 4041563.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3651404.

It is not an unprimeable number, because it can be changed into a prime (3651407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456422 + ... + 456429.

It is an arithmetic number, because the mean of its divisors is an integer number (1064994).

Almost surely, 2^3651404 is an apocalyptic number.

It is an amenable number.

3651404 is a deficient number, since it is larger than the sum of its proper divisors (2738560).

3651404 is a wasteful number, since it uses less digits than its factorization.

3651404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912855 (or 912853 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3651404 is about 1910.8647257197. The cubic root of 3651404 is about 153.9879115715.

Adding to 3651404 its reverse (4041563), we get a palindrome (7692967).

The spelling of 3651404 in words is "three million, six hundred fifty-one thousand, four hundred four".