40420550 has 24 divisors (see below), whose sum is σ = 75396216. Its totient is φ = 16122240.

The previous prime is 40420531. The next prime is 40420553. The reversal of 40420550 is 5502404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20717 + ... + 22583.

It is an arithmetic number, because the mean of its divisors is an integer number (3141509).

Almost surely, 2^40420550 is an apocalyptic number.

40420550 is a deficient number, since it is larger than the sum of its proper divisors (34975666).

40420550 is a wasteful number, since it uses less digits than its factorization.

40420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40420550 is about 6357.7157847768. The cubic root of 40420550 is about 343.1895639193.

Adding to 40420550 its reverse (5502404), we get a palindrome (45922954).

The spelling of 40420550 in words is "forty million, four hundred twenty thousand, five hundred fifty".