1630994412 has 12 divisors (see below), whose sum is σ = 3805653656. Its totient is φ = 543664800.

The previous prime is 1630994411. The next prime is 1630994483. The reversal of 1630994412 is 2144990361.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1630994411) 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, 67958089 + ... + 67958112.

Almost surely, 2^1630994412 is an apocalyptic number.

1630994412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1630994412 is an abundant number, since it is smaller than the sum of its proper divisors (2174659244).

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

1630994412 is a wasteful number, since it uses less digits than its factorization.

1630994412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135916208 (or 135916206 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1630994412 is about 40385.5718295532. The cubic root of 1630994412 is about 1177.1111974937. Note that the first 4 decimals are identical.

The spelling of 1630994412 in words is "one billion, six hundred thirty million, nine hundred ninety-four thousand, four hundred twelve".