3649440946 has 8 divisors (see below), whose sum is σ = 5481357084. Its totient is φ = 1822321920.

The previous prime is 3649440937. The next prime is 3649440947. The reversal of 3649440946 is 6490449463.

It can be written as a sum of positive squares in 2 ways, for example, as 3413480625 + 235960321 = 58425^2 + 15361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3649440946.

It is not an unprimeable number, because it can be changed into a prime (3649440947) 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, 1197375 + ... + 1200418.

Almost surely, 2^3649440946 is an apocalyptic number.

3649440946 is a deficient number, since it is larger than the sum of its proper divisors (1831916138).

3649440946 is a wasteful number, since it uses less digits than its factorization.

3649440946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398556.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The square root of 3649440946 is about 60410.6029269697. The cubic root of 3649440946 is about 1539.6031115869.

The spelling of 3649440946 in words is "three billion, six hundred forty-nine million, four hundred forty thousand, nine hundred forty-six".