18260880 has 80 divisors (see below), whose sum is σ = 61763904. Its totient is φ = 4426240.

The previous prime is 18260861. The next prime is 18260887. The reversal of 18260880 is 8806281.

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 (33).

It is not an unprimeable number, because it can be changed into a prime (18260887) by changing a digit.

It is a nontrivial repunit in base 263.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819 + ... + 6098.

Almost surely, 2^18260880 is an apocalyptic number.

18260880 is a gapful number since it is divisible by the number (10) 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 18260880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30881952).

18260880 is an abundant number, since it is smaller than the sum of its proper divisors (43503024).

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

18260880 is a wasteful number, since it uses less digits than its factorization.

18260880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6944 (or 6938 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18260880 is about 4273.2750906067. The cubic root of 18260880 is about 263.3341807731.

The spelling of 18260880 in words is "eighteen million, two hundred sixty thousand, eight hundred eighty".