3618646 has 4 divisors (see below), whose sum is σ = 5427972. Its totient is φ = 1809322.

The previous prime is 3618631. The next prime is 3618653. The reversal of 3618646 is 6468163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6468163 = 13 ⋅497551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904660 + ... + 904663.

It is an arithmetic number, because the mean of its divisors is an integer number (1356993).

Almost surely, 2^3618646 is an apocalyptic number.

3618646 is a deficient number, since it is larger than the sum of its proper divisors (1809326).

3618646 is a wasteful number, since it uses less digits than its factorization.

3618646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809325.

The product of its digits is 20736, while the sum is 34.

The square root of 3618646 is about 1902.2739024652. The cubic root of 3618646 is about 153.5260347640.

The spelling of 3618646 in words is "three million, six hundred eighteen thousand, six hundred forty-six".