11899650 has 72 divisors (see below), whose sum is σ = 34350480. Its totient is φ = 2718240.

The previous prime is 11899637. The next prime is 11899661. The reversal of 11899650 is 5699811.

It is a junction number, because it is equal to n+sod(n) for n = 11899599 and 11899608.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6541 + ... + 8159.

It is an arithmetic number, because the mean of its divisors is an integer number (477090).

Almost surely, 2^11899650 is an apocalyptic number.

11899650 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 11899650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17175240).

11899650 is an abundant number, since it is smaller than the sum of its proper divisors (22450830).

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

11899650 is a wasteful number, since it uses less digits than its factorization.

With its successor (11899651) it forms an eRAP, since the sums of their prime factors are consecutive (1648 and 1649).

11899650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 11899650 is about 3449.5869317934. The cubic root of 11899650 is about 228.3028830878.

The spelling of 11899650 in words is "eleven million, eight hundred ninety-nine thousand, six hundred fifty".