8405400740 has 48 divisors (see below), whose sum is σ = 19342471680. Its totient is φ = 3042785280.

The previous prime is 8405400733. The next prime is 8405400743. The reversal of 8405400740 is 470045048.

It is a junction number, because it is equal to n+sod(n) for n = 8405400697 and 8405400706.

It is not an unprimeable number, because it can be changed into a prime (8405400743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36605 + ... + 134724.

It is an arithmetic number, because the mean of its divisors is an integer number (402968160).

Almost surely, 2^8405400740 is an apocalyptic number.

It is an amenable number.

8405400740 is an abundant number, since it is smaller than the sum of its proper divisors (10937070940).

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

8405400740 is a wasteful number, since it uses less digits than its factorization.

8405400740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171572 (or 171570 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 8405400740 is about 91680.9726170049. The cubic root of 8405400740 is about 2033.2282784267.

Adding to 8405400740 its reverse (470045048), we get a palindrome (8875445788).

The spelling of 8405400740 in words is "eight billion, four hundred five million, four hundred thousand, seven hundred forty".