318749445 has 32 divisors (see below), whose sum is σ = 647619840. Its totient is φ = 145713600.

The previous prime is 318749443. The next prime is 318749467. The reversal of 318749445 is 544947813.

It is not a de Polignac number, because 318749445 - 2¹ = 318749443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 318749445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318749443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167706 + ... + 169595.

It is an arithmetic number, because the mean of its divisors is an integer number (20238120).

Almost surely, 2^318749445 is an apocalyptic number.

318749445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

318749445 is an abundant number, since it is smaller than the sum of its proper divisors (328870395).

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

318749445 is a wasteful number, since it uses less digits than its factorization.

318749445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337322 (or 337316 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 318749445 is about 17853.5555282414. Note that the first 4 decimals coincide. The cubic root of 318749445 is about 683.0982075583.

The spelling of 318749445 in words is "three hundred eighteen million, seven hundred forty-nine thousand, four hundred forty-five".