7812940 has 12 divisors (see below), whose sum is σ = 16407216. Its totient is φ = 3125168.

The previous prime is 7812929. The next prime is 7812943. The reversal of 7812940 is 492187.

It is a super-2 number, since 2×7812940² = 122084062887200, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (7812943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195304 + ... + 195343.

It is an arithmetic number, because the mean of its divisors is an integer number (1367268).

Almost surely, 2^7812940 is an apocalyptic number.

It is an amenable number.

7812940 is an abundant number, since it is smaller than the sum of its proper divisors (8594276).

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

7812940 is a wasteful number, since it uses less digits than its factorization.

7812940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390656 (or 390654 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7812940 is about 2795.1636803593. The cubic root of 7812940 is about 198.4288565272.

It can be divided in two parts, 781 and 2940, that added together give a square (3721 = 61²).

The spelling of 7812940 in words is "seven million, eight hundred twelve thousand, nine hundred forty".