320400100 has 36 divisors (see below), whose sum is σ = 696049200. Its totient is φ = 128016160.

The previous prime is 320400077. The next prime is 320400103. The reversal of 320400100 is 1004023.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (320400103) 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, 160911 + ... + 162889.

It is an arithmetic number, because the mean of its divisors is an integer number (19334700).

Almost surely, 2^320400100 is an apocalyptic number.

It is an amenable number.

320400100 is an abundant number, since it is smaller than the sum of its proper divisors (375649100).

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

320400100 is a wasteful number, since it uses less digits than its factorization.

320400100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 320400100 is about 17899.7234615510. The cubic root of 320400100 is about 684.2753271855.

Adding to 320400100 its reverse (1004023), we get a palindrome (321404123).

The spelling of 320400100 in words is "three hundred twenty million, four hundred thousand, one hundred".