11831830 has 32 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 4392960.

The previous prime is 11831803. The next prime is 11831839. The reversal of 11831830 is 3813811.

11831830 = T₁₀₀ + T₁₀₁ + ... + T₄₁₅.

It is a super-2 number, since 2×11831830² = 279984402297800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11831795 and 11831804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12990 + ... + 13870.

It is an arithmetic number, because the mean of its divisors is an integer number (714420).

Almost surely, 2^11831830 is an apocalyptic number.

11831830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11831830 is a deficient number, since it is larger than the sum of its proper divisors (11029610).

11831830 is a wasteful number, since it uses less digits than its factorization.

11831830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11831830 is about 3439.7427229373. The cubic root of 11831830 is about 227.8683322059.

The spelling of 11831830 in words is "eleven million, eight hundred thirty-one thousand, eight hundred thirty".