11628491940 has 144 divisors (see below), whose sum is σ = 38356002048. Its totient is φ = 2834548992.

The previous prime is 11628491939. The next prime is 11628491947. The reversal of 11628491940 is 4919482611.

It is a happy number.

11628491940 is a `hidden beast` number, since 1 + 1 + 628 + 4 + 9 + 19 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (11628491947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216897 + ... + 265143.

Almost surely, 2^11628491940 is an apocalyptic number.

11628491940 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 11628491940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19178001024).

11628491940 is an abundant number, since it is smaller than the sum of its proper divisors (26727510108).

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

11628491940 is a wasteful number, since it uses less digits than its factorization.

11628491940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48378 (or 48373 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 11628491940 in words is "eleven billion, six hundred twenty-eight million, four hundred ninety-one thousand, nine hundred forty".