320440252 has 24 divisors (see below), whose sum is σ = 614097792. Its totient is φ = 145095600.

The previous prime is 320440249. The next prime is 320440277. The reversal of 320440252 is 252044023.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 2274 + ... + 25417.

It is an arithmetic number, because the mean of its divisors is an integer number (25587408).

Almost surely, 2^320440252 is an apocalyptic number.

It is an amenable number.

320440252 is a deficient number, since it is larger than the sum of its proper divisors (293657540).

320440252 is a wasteful number, since it uses less digits than its factorization.

320440252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27969 (or 27967 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 320440252 is about 17900.8450079878. The cubic root of 320440252 is about 684.3039100681.

Adding to 320440252 its reverse (252044023), we get a palindrome (572484275).

The spelling of 320440252 in words is "three hundred twenty million, four hundred forty thousand, two hundred fifty-two".