7918940 has 24 divisors (see below), whose sum is σ = 17608752. Its totient is φ = 2981120.

The previous prime is 7918913. The next prime is 7918951. The reversal of 7918940 is 498197.

It is a super-2 number, since 2×7918940² = 125419221447200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7918894 and 7918903.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11306 + ... + 11985.

It is an arithmetic number, because the mean of its divisors is an integer number (733698).

Almost surely, 2^7918940 is an apocalyptic number.

It is an amenable number.

7918940 is an abundant number, since it is smaller than the sum of its proper divisors (9689812).

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

7918940 is a wasteful number, since it uses less digits than its factorization.

7918940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23317 (or 23315 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7918940 is about 2814.0611222928. The cubic root of 7918940 is about 199.3222055684.

The spelling of 7918940 in words is "seven million, nine hundred eighteen thousand, nine hundred forty".