1628775906 has 16 divisors (see below), whose sum is σ = 3274089984. Its totient is φ = 540168944.

The previous prime is 1628775871. The next prime is 1628775919. The reversal of 1628775906 is 6095778261.

It is a super-2 number, since 2×1628775906² = 5305821903932241672, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687810 + ... + 690173.

It is an arithmetic number, because the mean of its divisors is an integer number (204630624).

Almost surely, 2^1628775906 is an apocalyptic number.

1628775906 is an abundant number, since it is smaller than the sum of its proper divisors (1645314078).

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

1628775906 is a wasteful number, since it uses less digits than its factorization.

1628775906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378185.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 1628775906 is about 40358.0959164329. The cubic root of 1628775906 is about 1176.5772465153.

The spelling of 1628775906 in words is "one billion, six hundred twenty-eight million, seven hundred seventy-five thousand, nine hundred six".