7961920 has 56 divisors (see below), whose sum is σ = 19202400. Its totient is φ = 3144192.

The previous prime is 7961881. The next prime is 7961929. The reversal of 7961920 is 291697.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7961929) 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, 44391 + ... + 44569.

It is an arithmetic number, because the mean of its divisors is an integer number (342900).

Almost surely, 2^7961920 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 7961920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9601200).

7961920 is an abundant number, since it is smaller than the sum of its proper divisors (11240480).

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

7961920 is a wasteful number, since it uses less digits than its factorization.

7961920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 7961920 is about 2821.6874383957. The cubic root of 7961920 is about 199.6821618287.

The spelling of 7961920 in words is "seven million, nine hundred sixty-one thousand, nine hundred twenty".