3645449387 has 4 divisors (see below), whose sum is σ = 3645778656. Its totient is φ = 3645120120.

The previous prime is 3645449341. The next prime is 3645449407. The reversal of 3645449387 is 7839445463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3645449387 - 2⁶ = 3645449323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645449317) 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, 147428 + ... + 170369.

It is an arithmetic number, because the mean of its divisors is an integer number (911444664).

Almost surely, 2^3645449387 is an apocalyptic number.

3645449387 is a deficient number, since it is larger than the sum of its proper divisors (329269).

3645449387 is a wasteful number, since it uses less digits than its factorization.

3645449387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329268.

The product of its digits is 8709120, while the sum is 53.

The square root of 3645449387 is about 60377.5569810505. The cubic root of 3645449387 is about 1539.0415955796.

The spelling of 3645449387 in words is "three billion, six hundred forty-five million, four hundred forty-nine thousand, three hundred eighty-seven".