1628663404 has 12 divisors (see below), whose sum is σ = 2851695784. Its totient is φ = 813893184.

The previous prime is 1628663401. The next prime is 1628663431. The reversal of 1628663404 is 4043668261.

It is not an unprimeable number, because it can be changed into a prime (1628663401) 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, 101202 + ... + 116185.

Almost surely, 2^1628663404 is an apocalyptic number.

It is an amenable number.

1628663404 is a deficient number, since it is larger than the sum of its proper divisors (1223032380).

1628663404 is a wasteful number, since it uses less digits than its factorization.

1628663404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219264 (or 219262 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 1628663404 is about 40356.7020951911. The cubic root of 1628663404 is about 1176.5501565720.

The spelling of 1628663404 in words is "one billion, six hundred twenty-eight million, six hundred sixty-three thousand, four hundred four".