11512890 has 24 divisors (see below), whose sum is σ = 29933748. Its totient is φ = 3070080.

The previous prime is 11512861. The next prime is 11512901. The reversal of 11512890 is 9821511.

It can be written as a sum of positive squares in 2 ways, for example, as 11512449 + 441 = 3393^2 + 21^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63871 + ... + 64050.

Almost surely, 2^11512890 is an apocalyptic number.

11512890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11512890 is an abundant number, since it is smaller than the sum of its proper divisors (18420858).

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

11512890 is a wasteful number, since it uses less digits than its factorization.

11512890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127934 (or 127931 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 11512890 is about 3393.0649861151. The cubic root of 11512890 is about 225.8021737153.

The spelling of 11512890 in words is "eleven million, five hundred twelve thousand, eight hundred ninety".