8440623447 has 8 divisors (see below), whose sum is σ = 11256188544. Its totient is φ = 5626070328.

The previous prime is 8440623431. The next prime is 8440623461. The reversal of 8440623447 is 7443260448.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8440623447 - 2⁴ = 8440623431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8440623399 and 8440623408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440621447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233313 + ... + 267050.

It is an arithmetic number, because the mean of its divisors is an integer number (1407023568).

Almost surely, 2^8440623447 is an apocalyptic number.

8440623447 is a deficient number, since it is larger than the sum of its proper divisors (2815565097).

8440623447 is a wasteful number, since it uses less digits than its factorization.

8440623447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505989.

The product of its (nonzero) digits is 516096, while the sum is 42.

The square root of 8440623447 is about 91872.8656731682. The cubic root of 8440623447 is about 2036.0643915155.

The spelling of 8440623447 in words is "eight billion, four hundred forty million, six hundred twenty-three thousand, four hundred forty-seven".