447780811 has 4 divisors (see below), whose sum is σ = 447823432. Its totient is φ = 447738192.

The previous prime is 447780761. The next prime is 447780821. The reversal of 447780811 is 118087744.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 447780811 - 2¹⁵ = 447748043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447780821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880 + ... + 30706.

It is an arithmetic number, because the mean of its divisors is an integer number (111955858).

Almost surely, 2^447780811 is an apocalyptic number.

447780811 is a deficient number, since it is larger than the sum of its proper divisors (42621).

447780811 is a wasteful number, since it uses less digits than its factorization.

447780811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42620.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 447780811 is about 21160.8320016014. The cubic root of 447780811 is about 765.0476630277.

The spelling of 447780811 in words is "four hundred forty-seven million, seven hundred eighty thousand, eight hundred eleven".