999600040 has 24 divisors (see below), whose sum is σ = 2249550090. Its totient is φ = 399760032.

The previous prime is 999600037. The next prime is 999600047. The reversal of 999600040 is 40006999.

It can be written as a sum of positive squares in only one way, i.e., 899640036 + 99960004 = 29994^2 + 9998^2 .

It is not an unprimeable number, because it can be changed into a prime (999600047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197461 + ... + 202459.

Almost surely, 2^999600040 is an apocalyptic number.

It is an amenable number.

999600040 is an abundant number, since it is smaller than the sum of its proper divisors (1249950050).

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

999600040 is an frugal number, since it uses more digits than its factorization.

999600040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009 (or 5006 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 999600040 is about 31616.4520463635. The cubic root of 999600040 is about 999.8666622218.

The spelling of 999600040 in words is "nine hundred ninety-nine million, six hundred thousand, forty".