1630446906 has 16 divisors (see below), whose sum is σ = 3557338848. Its totient is φ = 494074800.

The previous prime is 1630446901. The next prime is 1630446919. The reversal of 1630446906 is 6096440361.

It is a super-2 number, since 2×1630446906² = 5316714226569945672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1630446901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12351805 + ... + 12351936.

It is an arithmetic number, because the mean of its divisors is an integer number (222333678).

Almost surely, 2^1630446906 is an apocalyptic number.

1630446906 is an abundant number, since it is smaller than the sum of its proper divisors (1926891942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1630446906 is a wasteful number, since it uses less digits than its factorization.

1630446906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24703757.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 1630446906 is about 40378.7927754162. The cubic root of 1630446906 is about 1176.9794685382.

The spelling of 1630446906 in words is "one billion, six hundred thirty million, four hundred forty-six thousand, nine hundred six".