1628404900 has 18 divisors (see below), whose sum is σ = 3533638850. Its totient is φ = 651361920.

The previous prime is 1628404871. The next prime is 1628404901. The reversal of 1628404900 is 94048261.

It can be written as a sum of positive squares in 3 ways, for example, as 102252544 + 1526152356 = 10112^2 + 39066^2 .

It is not an unprimeable number, because it can be changed into a prime (1628404901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8141925 + ... + 8142124.

Almost surely, 2^1628404900 is an apocalyptic number.

1628404900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628404900 is an abundant number, since it is smaller than the sum of its proper divisors (1905233950).

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

1628404900 is a wasteful number, since it uses less digits than its factorization.

1628404900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284063 (or 16284056 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1628404900 is about 40353.4992286914. The cubic root of 1628404900 is about 1176.4879053186.

The spelling of 1628404900 in words is "one billion, six hundred twenty-eight million, four hundred four thousand, nine hundred".