320678820 has 288 divisors, whose sum is σ = 1285030656. Its totient is φ = 62668800.

The previous prime is 320678819. The next prime is 320678833. The reversal of 320678820 is 28876023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 234940 + ... + 236300.

It is an arithmetic number, because the mean of its divisors is an integer number (4461912).

Almost surely, 2^320678820 is an apocalyptic number.

320678820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320678820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642515328).

320678820 is an abundant number, since it is smaller than the sum of its proper divisors (964351836).

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

320678820 is a wasteful number, since it uses less digits than its factorization.

320678820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 320678820 is about 17907.5073642313. The cubic root of 320678820 is about 684.4736895272.

The spelling of 320678820 in words is "three hundred twenty million, six hundred seventy-eight thousand, eight hundred twenty".