8405740 has 24 divisors (see below), whose sum is σ = 20174112. Its totient is φ = 2881920.

The previous prime is 8405723. The next prime is 8405759. The reversal of 8405740 is 475048.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 8405699 and 8405708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29881 + ... + 30160.

It is an arithmetic number, because the mean of its divisors is an integer number (840588).

Almost surely, 2^8405740 is an apocalyptic number.

It is an amenable number.

8405740 is an abundant number, since it is smaller than the sum of its proper divisors (11768372).

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

8405740 is a wasteful number, since it uses less digits than its factorization.

8405740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60057 (or 60055 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 8405740 is about 2899.2654242066. The cubic root of 8405740 is about 203.3255633210.

The spelling of 8405740 in words is "eight million, four hundred five thousand, seven hundred forty".