40400550 has 36 divisors (see below), whose sum is σ = 108544020. Its totient is φ = 10773360.

The previous prime is 40400527. The next prime is 40400557. The reversal of 40400550 is 5500404.

It is a happy number.

40400550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 44440 + ... + 45339.

Almost surely, 2^40400550 is an apocalyptic number.

40400550 is an abundant number, since it is smaller than the sum of its proper divisors (68143470).

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

40400550 is a wasteful number, since it uses less digits than its factorization.

40400550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89797 (or 89789 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 40400550 is about 6356.1426982093. The cubic root of 40400550 is about 343.1329514317.

Adding to 40400550 its reverse (5500404), we get a palindrome (45900954).

The spelling of 40400550 in words is "forty million, four hundred thousand, five hundred fifty".