8399020440 has 32 divisors (see below), whose sum is σ = 25197061680. Its totient is φ = 2239738752.

The previous prime is 8399020363. The next prime is 8399020453. The reversal of 8399020440 is 440209938.

It is a congruent number.

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, 34995799 + ... + 34996038.

Almost surely, 2^8399020440 is an apocalyptic number.

It is an amenable number.

8399020440 is an abundant number, since it is smaller than the sum of its proper divisors (16798041240).

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

8399020440 is a wasteful number, since it uses less digits than its factorization.

8399020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69991851 (or 69991847 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 8399020440 is about 91646.1698053989. The cubic root of 8399020440 is about 2032.7136930012.

The spelling of 8399020440 in words is "eight billion, three hundred ninety-nine million, twenty thousand, four hundred forty".