11639900 has 72 divisors (see below), whose sum is σ = 27560736. Its totient is φ = 4249600.

The previous prime is 11639897. The next prime is 11639963. The reversal of 11639900 is 993611.

11639900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69617 + ... + 69783.

It is an arithmetic number, because the mean of its divisors is an integer number (382788).

Almost surely, 2^11639900 is an apocalyptic number.

11639900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11639900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13780368).

11639900 is an abundant number, since it is smaller than the sum of its proper divisors (15920836).

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

11639900 is a wasteful number, since it uses less digits than its factorization.

11639900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 11639900 is about 3411.7297665554. The cubic root of 11639900 is about 226.6294873660.

The spelling of 11639900 in words is "eleven million, six hundred thirty-nine thousand, nine hundred".