400240550 has 24 divisors (see below), whose sum is σ = 748920816. Its totient is φ = 159134240.

The previous prime is 400240523. The next prime is 400240553. The reversal of 400240550 is 55042004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400240553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15617 + ... + 32316.

It is an arithmetic number, because the mean of its divisors is an integer number (31205034).

Almost surely, 2^400240550 is an apocalyptic number.

400240550 is a deficient number, since it is larger than the sum of its proper divisors (348680266).

400240550 is a wasteful number, since it uses less digits than its factorization.

400240550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48112 (or 48107 counting only the distinct ones).

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

The square root of 400240550 is about 20006.0128461420. The cubic root of 400240550 is about 736.9539690933.

Adding to 400240550 its reverse (55042004), we get a palindrome (455282554).

The spelling of 400240550 in words is "four hundred million, two hundred forty thousand, five hundred fifty".