3644487412 has 6 divisors (see below), whose sum is σ = 6377852978. Its totient is φ = 1822243704.

The previous prime is 3644487409. The next prime is 3644487443. The reversal of 3644487412 is 2147844463.

It can be written as a sum of positive squares in only one way, i.e., 3443811856 + 200675556 = 58684^2 + 14166^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455560923 + ... + 455560930.

Almost surely, 2^3644487412 is an apocalyptic number.

It is an amenable number.

3644487412 is a deficient number, since it is larger than the sum of its proper divisors (2733365566).

3644487412 is a wasteful number, since it uses less digits than its factorization.

3644487412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911121857 (or 911121855 counting only the distinct ones).

The product of its digits is 516096, while the sum is 43.

The square root of 3644487412 is about 60369.5901261554. The cubic root of 3644487412 is about 1538.9062076270.

The spelling of 3644487412 in words is "three billion, six hundred forty-four million, four hundred eighty-seven thousand, four hundred twelve".