11159780 has 48 divisors (see below), whose sum is σ = 24675840. Its totient is φ = 4233600.

The previous prime is 11159737. The next prime is 11159789. The reversal of 11159780 is 8795111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11159789) 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, 41045 + ... + 41315.

It is an arithmetic number, because the mean of its divisors is an integer number (514080).

Almost surely, 2^11159780 is an apocalyptic number.

11159780 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 11159780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12337920).

11159780 is an abundant number, since it is smaller than the sum of its proper divisors (13516060).

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

11159780 is a wasteful number, since it uses less digits than its factorization.

11159780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 11159780 is about 3340.6256898970. The cubic root of 11159780 is about 223.4696477291.

The spelling of 11159780 in words is "eleven million, one hundred fifty-nine thousand, seven hundred eighty".