13857783940 has 144 divisors (see below), whose sum is σ = 39369770496. Its totient is φ = 3986991360.

The previous prime is 13857783923. The next prime is 13857783983. The reversal of 13857783940 is 4938775831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188757 + ... + 251683.

It is an arithmetic number, because the mean of its divisors is an integer number (273401184).

Almost surely, 2^13857783940 is an apocalyptic number.

13857783940 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 13857783940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19684885248).

13857783940 is an abundant number, since it is smaller than the sum of its proper divisors (25511986556).

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

13857783940 is a wasteful number, since it uses less digits than its factorization.

13857783940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62978 (or 62965 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

It can be divided in two parts, 13857 and 783940, that added together give a palindrome (797797).

The spelling of 13857783940 in words is "thirteen billion, eight hundred fifty-seven million, seven hundred eighty-three thousand, nine hundred forty".