1630447444 has 12 divisors (see below), whose sum is σ = 2881534068. Its totient is φ = 807152000.

The previous prime is 1630447409. The next prime is 1630447453. The reversal of 1630447444 is 4447440361.

It can be written as a sum of positive squares in 2 ways, for example, as 987216400 + 643231044 = 31420^2 + 25362^2 .

It is a super-2 number, since 2×1630447444² = 5316717735292266272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2017477 + ... + 2018284.

It is an arithmetic number, because the mean of its divisors is an integer number (240127839).

Almost surely, 2^1630447444 is an apocalyptic number.

It is an amenable number.

1630447444 is a deficient number, since it is larger than the sum of its proper divisors (1251086624).

1630447444 is a wasteful number, since it uses less digits than its factorization.

1630447444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035866 (or 4035864 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 37.

The square root of 1630447444 is about 40378.7994373285. The cubic root of 1630447444 is about 1176.9795979945.

The spelling of 1630447444 in words is "one billion, six hundred thirty million, four hundred forty-seven thousand, four hundred forty-four".