3821649 has 32 divisors (see below), whose sum is σ = 5913600. Its totient is φ = 2177280.

The previous prime is 3821647. The next prime is 3821669. The reversal of 3821649 is 9461283.

It is not a de Polignac number, because 3821649 - 2¹ = 3821647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3821647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35007 + ... + 35115.

It is an arithmetic number, because the mean of its divisors is an integer number (184800).

Almost surely, 2^3821649 is an apocalyptic number.

3821649 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3821649 is a deficient number, since it is larger than the sum of its proper divisors (2091951).

3821649 is a wasteful number, since it uses less digits than its factorization.

3821649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its digits is 10368, while the sum is 33.

The square root of 3821649 is about 1954.9038339519. The cubic root of 3821649 is about 156.3448567491.

The spelling of 3821649 in words is "three million, eight hundred twenty-one thousand, six hundred forty-nine".