2315720 has 64 divisors (see below), whose sum is σ = 6004800. Its totient is φ = 794880.

The previous prime is 2315707. The next prime is 2315759. The reversal of 2315720 is 275132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2315692 and 2315701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8222 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (93825).

2^2315720 is an apocalyptic number.

2315720 is a gapful number since it is divisible by the number (20) 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 2315720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3002400).

2315720 is an abundant number, since it is smaller than the sum of its proper divisors (3689080).

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

2315720 is a wasteful number, since it uses less digits than its factorization.

2315720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2315720 is about 1521.7489937569. The cubic root of 2315720 is about 132.3006614533.

The spelling of 2315720 in words is "two million, three hundred fifteen thousand, seven hundred twenty".