447907646 has 4 divisors (see below), whose sum is σ = 671861472. Its totient is φ = 223953822.

The previous prime is 447907613. The next prime is 447907693. The reversal of 447907646 is 646709744.

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

It is a super-2 number, since 2×447907646² = 401242518690522632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 447907646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111976910 + ... + 111976913.

It is an arithmetic number, because the mean of its divisors is an integer number (167965368).

Almost surely, 2^447907646 is an apocalyptic number.

447907646 is a deficient number, since it is larger than the sum of its proper divisors (223953826).

447907646 is a wasteful number, since it uses less digits than its factorization.

447907646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223953825.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The square root of 447907646 is about 21163.8287178856. The cubic root of 447907646 is about 765.1198900769.

The spelling of 447907646 in words is "four hundred forty-seven million, nine hundred seven thousand, six hundred forty-six".