8961620 has 24 divisors (see below), whose sum is σ = 19087488. Its totient is φ = 3533600.

The previous prime is 8961619. The next prime is 8961661. The reversal of 8961620 is 261698.

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, 1736 + ... + 4575.

It is an arithmetic number, because the mean of its divisors is an integer number (795312).

Almost surely, 2^8961620 is an apocalyptic number.

It is an amenable number.

8961620 is an abundant number, since it is smaller than the sum of its proper divisors (10125868).

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

8961620 is a wasteful number, since it uses less digits than its factorization.

8961620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 8961620 is about 2993.5964991962. The cubic root of 8961620 is about 207.7122809394.

The spelling of 8961620 in words is "eight million, nine hundred sixty-one thousand, six hundred twenty".