1629889788 has 12 divisors (see below), whose sum is σ = 3803076200. Its totient is φ = 543296592.

The previous prime is 1629889783. The next prime is 1629889801. The reversal of 1629889788 is 8879889261.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629889783) 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, 67912063 + ... + 67912086.

Almost surely, 2^1629889788 is an apocalyptic number.

It is an amenable number.

1629889788 is an abundant number, since it is smaller than the sum of its proper divisors (2173186412).

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

1629889788 is a wasteful number, since it uses less digits than its factorization.

1629889788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135824156 (or 135824154 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 66.

The square root of 1629889788 is about 40371.8935399369. The cubic root of 1629889788 is about 1176.8453966784.

The spelling of 1629889788 in words is "one billion, six hundred twenty-nine million, eight hundred eighty-nine thousand, seven hundred eighty-eight".