11159920 has 40 divisors (see below), whose sum is σ = 26114400. Its totient is φ = 4435200.

The previous prime is 11159881. The next prime is 11159921. The reversal of 11159920 is 2995111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11159921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15570 + ... + 16270.

It is an arithmetic number, because the mean of its divisors is an integer number (652860).

Almost surely, 2^11159920 is an apocalyptic number.

11159920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11159920 is an abundant number, since it is smaller than the sum of its proper divisors (14954480).

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

11159920 is a wasteful number, since it uses less digits than its factorization.

11159920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 11159920 is about 3340.6466439898. The cubic root of 11159920 is about 223.4705822045.

It can be divided in two parts, 111 and 59920, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 11159920 in words is "eleven million, one hundred fifty-nine thousand, nine hundred twenty".