1447640806 has 4 divisors (see below), whose sum is σ = 2171461212. Its totient is φ = 723820402.

The previous prime is 1447640791. The next prime is 1447640807. The reversal of 1447640806 is 6080467441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6080467441 = 31 ⋅196144111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1447640807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361910200 + ... + 361910203.

It is an arithmetic number, because the mean of its divisors is an integer number (542865303).

Almost surely, 2^1447640806 is an apocalyptic number.

1447640806 is a deficient number, since it is larger than the sum of its proper divisors (723820406).

1447640806 is an equidigital number, since it uses as much as digits as its factorization.

1447640806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723820405.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 1447640806 is about 38047.8751837734. The cubic root of 1447640806 is about 1131.2370106625.

The spelling of 1447640806 in words is "one billion, four hundred forty-seven million, six hundred forty thousand, eight hundred six".