400440485 has 32 divisors (see below), whose sum is σ = 525312000. Its totient is φ = 291919680.

The previous prime is 400440479. The next prime is 400440499. The reversal of 400440485 is 584044004.

It is not a de Polignac number, because 400440485 - 2⁶ = 400440421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 668216 + ... + 668814.

It is an arithmetic number, because the mean of its divisors is an integer number (16416000).

Almost surely, 2^400440485 is an apocalyptic number.

It is an amenable number.

400440485 is a deficient number, since it is larger than the sum of its proper divisors (124871515).

400440485 is a wasteful number, since it uses less digits than its factorization.

400440485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 400440485 is about 20011.0090949957. The cubic root of 400440485 is about 737.0766606132.

Adding to 400440485 its reverse (584044004), we get a palindrome (984484489).

The spelling of 400440485 in words is "four hundred million, four hundred forty thousand, four hundred eighty-five".