40009550 has 48 divisors (see below), whose sum is σ = 86184960. Its totient is φ = 13534560.

The previous prime is 40009523. The next prime is 40009553. The reversal of 40009550 is 5590004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26927 + ... + 28373.

It is an arithmetic number, because the mean of its divisors is an integer number (1795520).

Almost surely, 2^40009550 is an apocalyptic number.

40009550 is an abundant number, since it is smaller than the sum of its proper divisors (46175410).

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

40009550 is a wasteful number, since it uses less digits than its factorization.

40009550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 40009550 is about 6325.3102690698. The cubic root of 40009550 is about 342.0224042867.

Adding to 40009550 its reverse (5590004), we get a palindrome (45599554).

The spelling of 40009550 in words is "forty million, nine thousand, five hundred fifty".