4009990509 has 48 divisors (see below), whose sum is σ = 7057785600. Its totient is φ = 2242634688.

The previous prime is 4009990483. The next prime is 4009990511. The reversal of 4009990509 is 9050999004.

It is a happy number.

It is not a de Polignac number, because 4009990509 - 2⁷ = 4009990381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009990559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29937 + ... + 94425.

It is an arithmetic number, because the mean of its divisors is an integer number (147037200).

Almost surely, 2^4009990509 is an apocalyptic number.

4009990509 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4009990509 is a deficient number, since it is larger than the sum of its proper divisors (3047795091).

4009990509 is a wasteful number, since it uses less digits than its factorization.

4009990509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64559 (or 64546 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 4009990509 is about 63324.4858565784. The cubic root of 4009990509 is about 1588.7215319301.

The spelling of 4009990509 in words is "four billion, nine million, nine hundred ninety thousand, five hundred nine".