11921610 has 64 divisors (see below), whose sum is σ = 30170880. Its totient is φ = 3010560.

The previous prime is 11921593. The next prime is 11921633. The reversal of 11921610 is 1612911.

11921610 = 70² + 71² + ... + 330².

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 31 ways as a sum of consecutive naturals, for example, 61674 + ... + 61866.

It is an arithmetic number, because the mean of its divisors is an integer number (471420).

Almost surely, 2^11921610 is an apocalyptic number.

11921610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11921610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15085440).

11921610 is an abundant number, since it is smaller than the sum of its proper divisors (18249270).

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

11921610 is a wasteful number, since it uses less digits than its factorization.

11921610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 11921610 is about 3452.7684544435. The cubic root of 11921610 is about 228.4432359673.

The spelling of 11921610 in words is "eleven million, nine hundred twenty-one thousand, six hundred ten".