445144403 has 32 divisors (see below), whose sum is σ = 518581440. Its totient is φ = 378327040.

The previous prime is 445144393. The next prime is 445144451. The reversal of 445144403 is 304441544.

It is not a de Polignac number, because 445144403 - 2¹² = 445140307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445144463) 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, 1910375 + ... + 1910607.

It is an arithmetic number, because the mean of its divisors is an integer number (16205670).

Almost surely, 2^445144403 is an apocalyptic number.

445144403 is a deficient number, since it is larger than the sum of its proper divisors (73437037).

445144403 is a wasteful number, since it uses less digits than its factorization.

445144403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 445144403 is about 21098.4455114589. The cubic root of 445144403 is about 763.5432445002.

Adding to 445144403 its reverse (304441544), we get a palindrome (749585947).

The spelling of 445144403 in words is "four hundred forty-five million, one hundred forty-four thousand, four hundred three".