8611920 has 120 divisors (see below), whose sum is σ = 30060576. Its totient is φ = 2291328.

The previous prime is 8611903. The next prime is 8611961. The reversal of 8611920 is 291168.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19219 + ... + 19661.

Almost surely, 2^8611920 is an apocalyptic number.

8611920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8611920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15030288).

8611920 is an abundant number, since it is smaller than the sum of its proper divisors (21448656).

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

8611920 is a wasteful number, since it uses less digits than its factorization.

8611920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 8611920 is about 2934.6072991118. The cubic root of 8611920 is about 204.9745754708.

The spelling of 8611920 in words is "eight million, six hundred eleven thousand, nine hundred twenty".