320435649 has 16 divisors (see below), whose sum is σ = 475536000. Its totient is φ = 213256368.

The previous prime is 320435639. The next prime is 320435653. The reversal of 320435649 is 946534023.

320435649 is a `hidden beast` number, since 3 + 2 + 0 + 4 + 3 + 5 + 649 = 666.

It is not a de Polignac number, because 320435649 - 2⁸ = 320435393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320435639) 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, 6267 + ... + 26079.

It is an arithmetic number, because the mean of its divisors is an integer number (29721000).

Almost surely, 2^320435649 is an apocalyptic number.

It is an amenable number.

320435649 is a deficient number, since it is larger than the sum of its proper divisors (155100351).

320435649 is a wasteful number, since it uses less digits than its factorization.

320435649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20421 (or 20415 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 320435649 is about 17900.7164381764. The cubic root of 320435649 is about 684.3006334656.

The spelling of 320435649 in words is "three hundred twenty million, four hundred thirty-five thousand, six hundred forty-nine".