11420440040 has 32 divisors (see below), whose sum is σ = 25773651360. Its totient is φ = 4554369600.

The previous prime is 11420440037. The next prime is 11420440049. The reversal of 11420440040 is 4004402411.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 11420439994 and 11420440021.

It is not an unprimeable number, because it can be changed into a prime (11420440049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418046 + ... + 444525.

It is an arithmetic number, because the mean of its divisors is an integer number (805426605).

Almost surely, 2^11420440040 is an apocalyptic number.

11420440040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11420440040 is an abundant number, since it is smaller than the sum of its proper divisors (14353211320).

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

11420440040 is a wasteful number, since it uses less digits than its factorization.

11420440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862913 (or 862909 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 11420440040 its reverse (4004402411), we get a palindrome (15424842451).

The spelling of 11420440040 in words is "eleven billion, four hundred twenty million, four hundred forty thousand, forty".