40404043242 has 48 divisors (see below), whose sum is σ = 95379054720. Its totient is φ = 12675773376.

The previous prime is 40404043231. The next prime is 40404043243. The reversal of 40404043242 is 24234040404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40404043243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1278898 + ... + 1310109.

It is an arithmetic number, because the mean of its divisors is an integer number (1987063640).

Almost surely, 2^40404043242 is an apocalyptic number.

40404043242 is an abundant number, since it is smaller than the sum of its proper divisors (54975011478).

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

40404043242 is a wasteful number, since it uses less digits than its factorization.

40404043242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589052 (or 2589029 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 40404043242 its reverse (24234040404), we get a palindrome (64638083646).

The spelling of 40404043242 in words is "forty billion, four hundred four million, forty-three thousand, two hundred forty-two".