400445541 has 24 divisors (see below), whose sum is σ = 601611296. Its totient is φ = 256465440.

The previous prime is 400445509. The next prime is 400445597. The reversal of 400445541 is 145544004.

It is not a de Polignac number, because 400445541 - 2⁵ = 400445509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400425541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15126 + ... + 32088.

Almost surely, 2^400445541 is an apocalyptic number.

It is an amenable number.

400445541 is a deficient number, since it is larger than the sum of its proper divisors (201165755).

400445541 is a wasteful number, since it uses less digits than its factorization.

400445541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073 (or 17070 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 400445541 is about 20011.1354250577. The cubic root of 400445541 is about 737.0797627337.

Adding to 400445541 its reverse (145544004), we get a palindrome (545989545).

The spelling of 400445541 in words is "four hundred million, four hundred forty-five thousand, five hundred forty-one".