320905478 has 32 divisors (see below), whose sum is σ = 517376640. Its totient is φ = 148832640.

The previous prime is 320905471. The next prime is 320905489. The reversal of 320905478 is 874509023.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320905471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613325 + ... + 613847.

It is an arithmetic number, because the mean of its divisors is an integer number (16168020).

Almost surely, 2^320905478 is an apocalyptic number.

320905478 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

320905478 is a deficient number, since it is larger than the sum of its proper divisors (196471162).

320905478 is a wasteful number, since it uses less digits than its factorization.

320905478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 320905478 is about 17913.8348211655. The cubic root of 320905478 is about 684.6349151217.

The spelling of 320905478 in words is "three hundred twenty million, nine hundred five thousand, four hundred seventy-eight".