11990890 has 8 divisors (see below), whose sum is σ = 21583620. Its totient is φ = 4796352.

The previous prime is 11990887. The next prime is 11990903. The reversal of 11990890 is 9809911.

It can be written as a sum of positive squares in 2 ways, for example, as 10843849 + 1147041 = 3293^2 + 1071^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599535 + ... + 599554.

Almost surely, 2^11990890 is an apocalyptic number.

11990890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11990890 is a deficient number, since it is larger than the sum of its proper divisors (9592730).

11990890 is a wasteful number, since it uses less digits than its factorization.

11990890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199096.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 11990890 is about 3462.7864502449. The cubic root of 11990890 is about 228.8848985839.

It can be divided in two parts, 11990 and 890, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 11990890 in words is "eleven million, nine hundred ninety thousand, eight hundred ninety".