318634820 has 48 divisors (see below), whose sum is σ = 768633600. Its totient is φ = 108687744.

The previous prime is 318634819. The next prime is 318634829. The reversal of 318634820 is 28436813.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (318634829) 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, 22142 + ... + 33578.

It is an arithmetic number, because the mean of its divisors is an integer number (16013200).

Almost surely, 2^318634820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318634820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384316800).

318634820 is an abundant number, since it is smaller than the sum of its proper divisors (449998780).

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

318634820 is a wasteful number, since it uses less digits than its factorization.

318634820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11652 (or 11650 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 318634820 is about 17850.3450947034. The cubic root of 318634820 is about 683.0163151075.

The spelling of 318634820 in words is "three hundred eighteen million, six hundred thirty-four thousand, eight hundred twenty".