400544011 has 32 divisors (see below), whose sum is σ = 499580928. Its totient is φ = 313679520.

The previous prime is 400543991. The next prime is 400544017. The reversal of 400544011 is 110445004.

It is not a de Polignac number, because 400544011 - 2¹¹ = 400541963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400544011.

It is not an unprimeable number, because it can be changed into a prime (400544017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324766 + ... + 325996.

It is an arithmetic number, because the mean of its divisors is an integer number (15611904).

Almost surely, 2^400544011 is an apocalyptic number.

400544011 is a deficient number, since it is larger than the sum of its proper divisors (99036917).

400544011 is a wasteful number, since it uses less digits than its factorization.

400544011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 400544011 is about 20013.5956539548. The cubic root of 400544011 is about 737.1401740243.

Adding to 400544011 its reverse (110445004), we get a palindrome (510989015).

The spelling of 400544011 in words is "four hundred million, five hundred forty-four thousand, eleven".