320025402 has 24 divisors (see below), whose sum is σ = 698686560. Its totient is φ = 105860040.

The previous prime is 320025401. The next prime is 320025403. The reversal of 320025402 is 204520023.

It is an interprime number because it is at equal distance from previous prime (320025401) and next prime (320025403).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (320025401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65502 + ... + 70217.

It is an arithmetic number, because the mean of its divisors is an integer number (29111940).

Almost surely, 2^320025402 is an apocalyptic number.

320025402 is an abundant number, since it is smaller than the sum of its proper divisors (378661158).

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

320025402 is a wasteful number, since it uses less digits than its factorization.

320025402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135858 (or 135855 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 320025402 is about 17889.2538133931. The cubic root of 320025402 is about 684.0084768622.

Adding to 320025402 its reverse (204520023), we get a palindrome (524545425).

The spelling of 320025402 in words is "three hundred twenty million, twenty-five thousand, four hundred two".