320499378 has 36 divisors (see below), whose sum is σ = 712433358. Its totient is φ = 104069280.

The previous prime is 320499373. The next prime is 320499383. The reversal of 320499378 is 873994023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320499373) and next prime (320499383).

It can be written as a sum of positive squares in only one way, i.e., 316590849 + 3908529 = 17793^2 + 1977^2 .

It is not an unprimeable number, because it can be changed into a prime (320499373) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 486013 + ... + 486671.

Almost surely, 2^320499378 is an apocalyptic number.

320499378 is an abundant number, since it is smaller than the sum of its proper divisors (391933980).

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

320499378 is an equidigital number, since it uses as much as digits as its factorization.

320499378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 320499378 is about 17902.4964180977. The cubic root of 320499378 is about 684.3459955682.

The spelling of 320499378 in words is "three hundred twenty million, four hundred ninety-nine thousand, three hundred seventy-eight".