320949440 has 56 divisors (see below), whose sum is σ = 873447072. Its totient is φ = 110039040.

The previous prime is 320949437. The next prime is 320949449. The reversal of 320949440 is 44949023.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 320949440.

It is not an unprimeable number, because it can be changed into a prime (320949449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69401 + ... + 73880.

Almost surely, 2^320949440 is an apocalyptic number.

It is an amenable number.

320949440 is an abundant number, since it is smaller than the sum of its proper divisors (552497632).

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

320949440 is a wasteful number, since it uses less digits than its factorization.

320949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143305 (or 143295 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 320949440 is about 17915.0618195975. The cubic root of 320949440 is about 684.6661772304. Note that the first 3 decimals are identical.

The spelling of 320949440 in words is "three hundred twenty million, nine hundred forty-nine thousand, four hundred forty".