11621900 has 72 divisors (see below), whose sum is σ = 27331584. Its totient is φ = 4276800.

The previous prime is 11621873. The next prime is 11621921. The reversal of 11621900 is 912611.

It is a super-2 number, since 2×11621900² = 270137119220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 71219 + ... + 71381.

Almost surely, 2^11621900 is an apocalyptic number.

11621900 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 11621900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13665792).

11621900 is an abundant number, since it is smaller than the sum of its proper divisors (15709684).

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

11621900 is a wasteful number, since it uses less digits than its factorization.

11621900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 11621900 is about 3409.0907878788. The cubic root of 11621900 is about 226.5126067700.

It can be divided in two parts, 11621 and 900, that added together give a palindrome (12521).

The spelling of 11621900 in words is "eleven million, six hundred twenty-one thousand, nine hundred".