990040671 has 8 divisors (see below), whose sum is σ = 1466726960.
Its totient is φ = 660027096.
The previous prime is 990040661. The next prime is 990040693. The reversal of 990040671 is 176040099.
It is not a de Polignac number, because 990040671 - 219 = 989516383 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (990040631) 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, 18334060 + ... + 18334113.
It is an arithmetic number, because the mean of its divisors is an integer number (183340870).
Almost surely, 2990040671 is an apocalyptic number.
990040671 is a deficient number, since it is larger than the sum of its proper divisors (476686289).
990040671 is a wasteful number, since it uses less digits than its factorization.
990040671 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 36668182 (or 36668176 counting only the distinct ones).
The product of its (nonzero) digits is 13608, while the sum is 36.
The square root of 990040671 is about 31464.9117430830.
The cubic root of 990040671 is about 996.6691413656.
The spelling of 990040671 in words is "nine hundred ninety million, forty thousand, six hundred seventy-one".