445535638 has 4 divisors (see below), whose sum is σ = 668303460. Its totient is φ = 222767818.

The previous prime is 445535621. The next prime is 445535639. The reversal of 445535638 is 836535544.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 445535594 and 445535603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445535639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111383908 + ... + 111383911.

It is an arithmetic number, because the mean of its divisors is an integer number (167075865).

Almost surely, 2^445535638 is an apocalyptic number.

445535638 is a deficient number, since it is larger than the sum of its proper divisors (222767822).

445535638 is a wasteful number, since it uses less digits than its factorization.

445535638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222767821.

The product of its digits is 864000, while the sum is 43.

The square root of 445535638 is about 21107.7151297813. The cubic root of 445535638 is about 763.7668703365.

It can be divided in two parts, 4455 and 35638, that multiplied together give a triangular number (158767290 = T₁₇₈₁₉).

The spelling of 445535638 in words is "four hundred forty-five million, five hundred thirty-five thousand, six hundred thirty-eight".