315820380 has 96 divisors (see below), whose sum is σ = 911522304. Its totient is φ = 81656064.

The previous prime is 315820367. The next prime is 315820391. The reversal of 315820380 is 83028513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430494 + ... + 431226.

It is an arithmetic number, because the mean of its divisors is an integer number (9495024).

Almost surely, 2^315820380 is an apocalyptic number.

315820380 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 315820380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455761152).

315820380 is an abundant number, since it is smaller than the sum of its proper divisors (595701924).

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

315820380 is a wasteful number, since it uses less digits than its factorization.

315820380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 315820380 is about 17771.3359092669. The cubic root of 315820380 is about 680.9993811462. Note that the first 3 decimals are identical.

Adding to 315820380 its reverse (83028513), we get a palindrome (398848893).

The spelling of 315820380 in words is "three hundred fifteen million, eight hundred twenty thousand, three hundred eighty".