318485520 has 280 divisors, whose sum is σ = 1144974336. Its totient is φ = 82301184.

The previous prime is 318485501. The next prime is 318485527. The reversal of 318485520 is 25584813.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (318485527) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2507697 + ... + 2507823.

Almost surely, 2^318485520 is an apocalyptic number.

318485520 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 318485520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (572487168).

318485520 is an abundant number, since it is smaller than the sum of its proper divisors (826488816).

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

318485520 is a wasteful number, since it uses less digits than its factorization.

318485520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 318485520 is about 17846.1626127299. The cubic root of 318485520 is about 682.9096200649.

The spelling of 318485520 in words is "three hundred eighteen million, four hundred eighty-five thousand, five hundred twenty".