7813720 has 16 divisors (see below), whose sum is σ = 17580960. Its totient is φ = 3125472.

The previous prime is 7813717. The next prime is 7813723. The reversal of 7813720 is 273187.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7813717) and next prime (7813723).

It is a super-2 number, since 2×7813720² = 122108440476800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7813723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 97632 + ... + 97711.

It is an arithmetic number, because the mean of its divisors is an integer number (1098810).

Almost surely, 2^7813720 is an apocalyptic number.

It is an amenable number.

7813720 is an abundant number, since it is smaller than the sum of its proper divisors (9767240).

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

7813720 is a wasteful number, since it uses less digits than its factorization.

7813720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195354 (or 195350 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 7813720 is about 2795.3032035899. The cubic root of 7813720 is about 198.4354596479.

The spelling of 7813720 in words is "seven million, eight hundred thirteen thousand, seven hundred twenty".