1628789100 has 36 divisors (see below), whose sum is σ = 4712630664. Its totient is φ = 434343680.

The previous prime is 1628789081. The next prime is 1628789153. The reversal of 1628789100 is 19878261.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2714349 + ... + 2714948.

Almost surely, 2^1628789100 is an apocalyptic number.

1628789100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628789100 is an abundant number, since it is smaller than the sum of its proper divisors (3083841564).

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

1628789100 is a wasteful number, since it uses less digits than its factorization.

1628789100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429314 (or 5429307 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1628789100 is about 40358.2593777284. The cubic root of 1628789100 is about 1176.5804234857.

The spelling of 1628789100 in words is "one billion, six hundred twenty-eight million, seven hundred eighty-nine thousand, one hundred".