11901830 has 16 divisors (see below), whose sum is σ = 22114944.
Its totient is φ = 4607040.
The previous prime is 11901821. The next prime is 11901899. The reversal of 11901830 is 3810911.
It is a junction number, because it is equal to n+sod(n) for n = 11901796 and 11901805.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18887 + ... + 19506.
It is an arithmetic number, because the mean of its divisors is an integer number (1382184).
Almost surely, 211901830 is an apocalyptic number.
11901830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
11901830 is a deficient number, since it is larger than the sum of its proper divisors (10213114).
11901830 is a wasteful number, since it uses less digits than its factorization.
11901830 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 38431.
The product of its (nonzero) digits is 216, while the sum is 23.
The square root of 11901830 is about 3449.9028971842.
The cubic root of 11901830 is about 228.3168238310.
The spelling of 11901830 in words is "eleven million, nine hundred one thousand, eight hundred thirty".