320636040 has 64 divisors (see below), whose sum is σ = 965986560. Its totient is φ = 85140480.

The previous prime is 320636023. The next prime is 320636051. The reversal of 320636040 is 40636023.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 320636040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23377 + ... + 34463.

It is an arithmetic number, because the mean of its divisors is an integer number (15093540).

Almost surely, 2^320636040 is an apocalyptic number.

320636040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320636040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482993280).

320636040 is an abundant number, since it is smaller than the sum of its proper divisors (645350520).

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

320636040 is a wasteful number, since it uses less digits than its factorization.

320636040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342 (or 11338 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 320636040 is about 17906.3128532928. The cubic root of 320636040 is about 684.4432508818.

The spelling of 320636040 in words is "three hundred twenty million, six hundred thirty-six thousand, forty".