3648861 has 16 divisors (see below), whose sum is σ = 5448000. Its totient is φ = 2413584.

The previous prime is 3648859. The next prime is 3648899. The reversal of 3648861 is 1688463.

It is a happy number.

3648861 is a `hidden beast` number, since 3 + 648 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 3648861 - 2¹ = 3648859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3648661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3570 + ... + 4476.

It is an arithmetic number, because the mean of its divisors is an integer number (340500).

Almost surely, 2^3648861 is an apocalyptic number.

It is an amenable number.

3648861 is a deficient number, since it is larger than the sum of its proper divisors (1799139).

3648861 is a wasteful number, since it uses less digits than its factorization.

3648861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1059 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 3648861 is about 1910.1992042716. The cubic root of 3648861 is about 153.9521552614.

The spelling of 3648861 in words is "three million, six hundred forty-eight thousand, eight hundred sixty-one".