1628512085 has 8 divisors (see below), whose sum is σ = 1961271096. Its totient is φ = 1298105280.

The previous prime is 1628512063. The next prime is 1628512133. The reversal of 1628512085 is 5802158261.

It can be written as a sum of positive squares in 4 ways, for example, as 76073284 + 1552438801 = 8722^2 + 39401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1628512085 - 2²² = 1624317781 is a prime.

It is a super-2 number, since 2×1628512085² = 5304103221982094450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586526 + ... + 589295.

It is an arithmetic number, because the mean of its divisors is an integer number (245158887).

Almost surely, 2^1628512085 is an apocalyptic number.

It is an amenable number.

1628512085 is a deficient number, since it is larger than the sum of its proper divisors (332759011).

1628512085 is a wasteful number, since it uses less digits than its factorization.

1628512085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176103.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 1628512085 is about 40354.8272824950. The cubic root of 1628512085 is about 1176.5137177132.

The spelling of 1628512085 in words is "one billion, six hundred twenty-eight million, five hundred twelve thousand, eighty-five".