13855388040 has 128 divisors (see below), whose sum is σ = 49737340800. Its totient is φ = 3410553600.

The previous prime is 13855388021. The next prime is 13855388047. The reversal of 13855388040 is 4088355831.

13855388040 is a `hidden beast` number, since 1 + 38 + 5 + 538 + 80 + 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 (13855388047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479386 + ... + 507465.

It is an arithmetic number, because the mean of its divisors is an integer number (388572975).

Almost surely, 2^13855388040 is an apocalyptic number.

13855388040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13855388040 is an abundant number, since it is smaller than the sum of its proper divisors (35881952760).

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

13855388040 is a wasteful number, since it uses less digits than its factorization.

13855388040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986884 (or 986874 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 13855388040 in words is "thirteen billion, eight hundred fifty-five million, three hundred eighty-eight thousand, forty".