7955840 has 64 divisors (see below), whose sum is σ = 19681920. Its totient is φ = 3072000.

The previous prime is 7955807. The next prime is 7955863. The reversal of 7955840 is 485597.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 7955794 and 7955803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19640 + ... + 20040.

It is an arithmetic number, because the mean of its divisors is an integer number (307530).

Almost surely, 2^7955840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7955840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9840960).

7955840 is an abundant number, since it is smaller than the sum of its proper divisors (11726080).

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

7955840 is a wasteful number, since it uses less digits than its factorization.

7955840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 7955840 is about 2820.6098631324. The cubic root of 7955840 is about 199.6313207958.

The spelling of 7955840 in words is "seven million, nine hundred fifty-five thousand, eight hundred forty".