320020402 has 16 divisors (see below), whose sum is σ = 517487040. Its totient is φ = 147550032.

The previous prime is 320020397. The next prime is 320020411. The reversal of 320020402 is 204020023.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 21849 + ... + 33427.

It is an arithmetic number, because the mean of its divisors is an integer number (32342940).

Almost surely, 2^320020402 is an apocalyptic number.

320020402 is a deficient number, since it is larger than the sum of its proper divisors (197466638).

320020402 is a wasteful number, since it uses less digits than its factorization.

320020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 320020402 is about 17889.1140641453. The cubic root of 320020402 is about 684.0049145823.

Adding to 320020402 its reverse (204020023), we get a palindrome (524040425).

It can be divided in two parts, 3200 and 20402, that multiplied together give a square (65286400 = 8080²).

The spelling of 320020402 in words is "three hundred twenty million, twenty thousand, four hundred two".