8440381523 has 16 divisors (see below), whose sum is σ = 9787000320. Its totient is φ = 7129080000.

The previous prime is 8440381517. The next prime is 8440381541. The reversal of 8440381523 is 3251830448.

It is a happy number.

It is not a de Polignac number, because 8440381523 - 2³² = 4145414227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440381513) 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, 1488668 + ... + 1494326.

It is an arithmetic number, because the mean of its divisors is an integer number (611687520).

Almost surely, 2^8440381523 is an apocalyptic number.

8440381523 is a deficient number, since it is larger than the sum of its proper divisors (1346618797).

8440381523 is a wasteful number, since it uses less digits than its factorization.

8440381523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8738.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 8440381523 is about 91871.5490399503. The cubic root of 8440381523 is about 2036.0449388628.

The spelling of 8440381523 in words is "eight billion, four hundred forty million, three hundred eighty-one thousand, five hundred twenty-three".