7901620 has 24 divisors (see below), whose sum is σ = 16768584. Its totient is φ = 3127296.

The previous prime is 7901603. The next prime is 7901669. The reversal of 7901620 is 261097.

It can be written as a sum of positive squares in 4 ways, for example, as 39204 + 7862416 = 198^2 + 2804^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97 + ... + 3976.

It is an arithmetic number, because the mean of its divisors is an integer number (698691).

Almost surely, 2^7901620 is an apocalyptic number.

It is an amenable number.

7901620 is an abundant number, since it is smaller than the sum of its proper divisors (8866964).

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

7901620 is a wasteful number, since it uses less digits than its factorization.

7901620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179 (or 4177 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 7901620 is about 2810.9820348056. The cubic root of 7901620 is about 199.1767828836.

The spelling of 7901620 in words is "seven million, nine hundred one thousand, six hundred twenty".