11928890 has 8 divisors (see below), whose sum is σ = 21472020. Its totient is φ = 4771552.

The previous prime is 11928887. The next prime is 11928899. The reversal of 11928890 is 9882911.

It can be written as a sum of positive squares in 2 ways, for example, as 10413529 + 1515361 = 3227^2 + 1231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11928899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596435 + ... + 596454.

Almost surely, 2^11928890 is an apocalyptic number.

11928890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11928890 is a deficient number, since it is larger than the sum of its proper divisors (9543130).

11928890 is a wasteful number, since it uses less digits than its factorization.

11928890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192896.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 11928890 is about 3453.8225200493. The cubic root of 11928890 is about 228.4897265658.

The spelling of 11928890 in words is "eleven million, nine hundred twenty-eight thousand, eight hundred ninety".