11780988 has 48 divisors (see below), whose sum is σ = 29205120. Its totient is φ = 3685824.

The previous prime is 11780971. The next prime is 11781001. The reversal of 11780988 is 88908711.

It is a super-2 number, since 2×11780988² = 277583356512288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37006 + ... + 37322.

It is an arithmetic number, because the mean of its divisors is an integer number (608440).

Almost surely, 2^11780988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11780988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14602560).

11780988 is an abundant number, since it is smaller than the sum of its proper divisors (17424132).

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

11780988 is a wasteful number, since it uses less digits than its factorization.

11780988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 11780988 is about 3432.3443883154. The cubic root of 11780988 is about 227.5414761557.

The spelling of 11780988 in words is "eleven million, seven hundred eighty thousand, nine hundred eighty-eight".