447138637 has 16 divisors (see below), whose sum is σ = 511064064. Its totient is φ = 387486000.

The previous prime is 447138619. The next prime is 447138667. The reversal of 447138637 is 736831744.

It is a de Polignac number, because none of the positive numbers 2^k-447138637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 447138593 and 447138602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447138667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13062 + ... + 32632.

It is an arithmetic number, because the mean of its divisors is an integer number (31941504).

Almost surely, 2^447138637 is an apocalyptic number.

It is an amenable number.

447138637 is a deficient number, since it is larger than the sum of its proper divisors (63925427).

447138637 is a wasteful number, since it uses less digits than its factorization.

447138637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19680.

The product of its digits is 338688, while the sum is 43.

The square root of 447138637 is about 21145.6529102319. The cubic root of 447138637 is about 764.6817632004.

The spelling of 447138637 in words is "four hundred forty-seven million, one hundred thirty-eight thousand, six hundred thirty-seven".