318734640 has 120 divisors (see below), whose sum is σ = 1223353248. Its totient is φ = 72852480.

The previous prime is 318734629. The next prime is 318734641. The reversal of 318734640 is 46437813.

318734640 is a `hidden beast` number, since 3 + 1 + 8 + 7 + 3 + 4 + 640 = 666.

318734640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 318734595 and 318734604.

It is not an unprimeable number, because it can be changed into a prime (318734641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26581 + ... + 36660.

Almost surely, 2^318734640 is an apocalyptic number.

318734640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

318734640 is an abundant number, since it is smaller than the sum of its proper divisors (904618608).

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

318734640 is a wasteful number, since it uses less digits than its factorization.

318734640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63267 (or 63258 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 318734640 is about 17853.1409001330. The cubic root of 318734640 is about 683.0876314086.

The spelling of 318734640 in words is "three hundred eighteen million, seven hundred thirty-four thousand, six hundred forty".