400041555 has 16 divisors (see below), whose sum is σ = 640673280. Its totient is φ = 213153248.

The previous prime is 400041547. The next prime is 400041557. The reversal of 400041555 is 555140004.

It is a cyclic number.

It is not a de Polignac number, because 400041555 - 2³ = 400041547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400041557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4456 + ... + 28634.

It is an arithmetic number, because the mean of its divisors is an integer number (40042080).

Almost surely, 2^400041555 is an apocalyptic number.

400041555 is a deficient number, since it is larger than the sum of its proper divisors (240631725).

400041555 is a wasteful number, since it uses less digits than its factorization.

400041555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25290.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 400041555 is about 20001.0388480199. The cubic root of 400041555 is about 736.8318138327.

Adding to 400041555 its reverse (555140004), we get a palindrome (955181559).

The spelling of 400041555 in words is "four hundred million, forty-one thousand, five hundred fifty-five".