445654638 has 48 divisors (see below), whose sum is σ = 1134400176. Its totient is φ = 124657920.

The previous prime is 445654637. The next prime is 445654661. The reversal of 445654638 is 836456544.

445654638 is a `hidden beast` number, since 4 + 4 + 5 + 6 + 5 + 4 + 638 = 666.

It is a super-2 number, since 2×445654638² = 397216112741822088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445654593 and 445654602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445654637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83995 + ... + 89142.

It is an arithmetic number, because the mean of its divisors is an integer number (23633337).

Almost surely, 2^445654638 is an apocalyptic number.

445654638 is an abundant number, since it is smaller than the sum of its proper divisors (688745538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445654638 is a wasteful number, since it uses less digits than its factorization.

445654638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173169 (or 173166 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The square root of 445654638 is about 21110.5338160834. The cubic root of 445654638 is about 763.8348635257.

The spelling of 445654638 in words is "four hundred forty-five million, six hundred fifty-four thousand, six hundred thirty-eight".