8611440 has 80 divisors (see below), whose sum is σ = 27239328. Its totient is φ = 2249728.

The previous prime is 8611439. The next prime is 8611441. The reversal of 8611440 is 441168.

It is an interprime number because it is at equal distance from previous prime (8611439) and next prime (8611441).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 8611440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8611441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12382 + ... + 13058.

Almost surely, 2^8611440 is an apocalyptic number.

8611440 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 8611440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13619664).

8611440 is an abundant number, since it is smaller than the sum of its proper divisors (18627888).

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

8611440 is a wasteful number, since it uses less digits than its factorization.

8611440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8611440 is about 2934.5255153091. The cubic root of 8611440 is about 204.9707671979.

The spelling of 8611440 in words is "eight million, six hundred eleven thousand, four hundred forty".