11901880 has 32 divisors (see below), whose sum is σ = 27185040. Its totient is φ = 4688640.

The previous prime is 11901821. The next prime is 11901899. The reversal of 11901880 is 8810911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460 + ... + 4900.

Almost surely, 2^11901880 is an apocalyptic number.

11901880 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 11901880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13592520).

11901880 is an abundant number, since it is smaller than the sum of its proper divisors (15283160).

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

11901880 is a wasteful number, since it uses less digits than its factorization.

11901880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519 (or 4515 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 11901880 is about 3449.9101437574. The cubic root of 11901880 is about 228.3171435529.

The spelling of 11901880 in words is "eleven million, nine hundred one thousand, eight hundred eighty".