8405023780 has 24 divisors (see below), whose sum is σ = 18081052920. Its totient is φ = 3280008960.

The previous prime is 8405023763. The next prime is 8405023789. The reversal of 8405023780 is 873205048.

It can be written as a sum of positive squares in 4 ways, for example, as 257795136 + 8147228644 = 16056^2 + 90262^2 .

It is not an unprimeable number, because it can be changed into a prime (8405023789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5124195 + ... + 5125834.

It is an arithmetic number, because the mean of its divisors is an integer number (753377205).

Almost surely, 2^8405023780 is an apocalyptic number.

It is an amenable number.

8405023780 is an abundant number, since it is smaller than the sum of its proper divisors (9676029140).

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

8405023780 is a wasteful number, since it uses less digits than its factorization.

8405023780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250079 (or 10250077 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 8405023780 is about 91678.9167693423. The cubic root of 8405023780 is about 2033.1978830014.

The spelling of 8405023780 in words is "eight billion, four hundred five million, twenty-three thousand, seven hundred eighty".