7916640 has 48 divisors (see below), whose sum is σ = 24938928. Its totient is φ = 2110976.

The previous prime is 7916627. The next prime is 7916647. The reversal of 7916640 is 466197.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7916647) 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, 7767 + ... + 8726.

It is an arithmetic number, because the mean of its divisors is an integer number (519561).

Almost surely, 2^7916640 is an apocalyptic number.

It is an amenable number.

7916640 is an abundant number, since it is smaller than the sum of its proper divisors (17022288).

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

7916640 is a wasteful number, since it uses less digits than its factorization.

7916640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16511 (or 16503 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 7916640 is about 2813.6524305607. The cubic root of 7916640 is about 199.3029064592.

The spelling of 7916640 in words is "seven million, nine hundred sixteen thousand, six hundred forty".