7313820 has 48 divisors (see below), whose sum is σ = 20751360. Its totient is φ = 1924416.

The previous prime is 7313819. The next prime is 7313833. The reversal of 7313820 is 283137.

It is an Ulam number.

It is a congruent number.

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, 3969 + ... + 5511.

It is an arithmetic number, because the mean of its divisors is an integer number (432320).

Almost surely, 2^7313820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7313820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10375680).

7313820 is an abundant number, since it is smaller than the sum of its proper divisors (13437540).

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

7313820 is a wasteful number, since it uses less digits than its factorization.

7313820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 7313820 is about 2704.4075136710. The cubic root of 7313820 is about 194.1100802971.

Adding to 7313820 its reverse (283137), we get a palindrome (7596957).

The spelling of 7313820 in words is "seven million, three hundred thirteen thousand, eight hundred twenty".