320430040 has 32 divisors (see below), whose sum is σ = 823963680. Its totient is φ = 109861632.

The previous prime is 320430031. The next prime is 320430053. The reversal of 320430040 is 40034023.

It is a junction number, because it is equal to n+sod(n) for n = 320429996 and 320430023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571917 + ... + 572476.

It is an arithmetic number, because the mean of its divisors is an integer number (25748865).

Almost surely, 2^320430040 is an apocalyptic number.

It is an amenable number.

320430040 is an abundant number, since it is smaller than the sum of its proper divisors (503533640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320430040 is a wasteful number, since it uses less digits than its factorization.

320430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144411 (or 1144407 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 320430040 is about 17900.5597677838. The cubic root of 320430040 is about 684.2966407090.

Adding to 320430040 its reverse (40034023), we get a palindrome (360464063).

The spelling of 320430040 in words is "three hundred twenty million, four hundred thirty thousand, forty".