7813930 has 16 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 3106192.

The previous prime is 7813909. The next prime is 7813937. The reversal of 7813930 is 393187.

It is a super-2 number, since 2×7813930² = 122115004089800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7813892 and 7813901.

It is not an unprimeable number, because it can be changed into a prime (7813937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670 + ... + 4009.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^7813930 is an apocalyptic number.

7813930 is a deficient number, since it is larger than the sum of its proper divisors (6338390).

7813930 is a wasteful number, since it uses less digits than its factorization.

7813930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 7813930 is about 2795.3407663467. The cubic root of 7813930 is about 198.4372373361.

The spelling of 7813930 in words is "seven million, eight hundred thirteen thousand, nine hundred thirty".