1628987715 has 48 divisors (see below), whose sum is σ = 2907684000. Its totient is φ = 843042816.

The previous prime is 1628987713. The next prime is 1628987729. The reversal of 1628987715 is 5177898261.

1628987715 is a `hidden beast` number, since 1 + 628 + 9 + 8 + 7 + 7 + 1 + 5 = 666.

It is not a de Polignac number, because 1628987715 - 2¹ = 1628987713 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1628987713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 746496 + ... + 748674.

It is an arithmetic number, because the mean of its divisors is an integer number (60576750).

Almost surely, 2^1628987715 is an apocalyptic number.

1628987715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1628987715 is a deficient number, since it is larger than the sum of its proper divisors (1278696285).

1628987715 is a wasteful number, since it uses less digits than its factorization.

1628987715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 2673 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The square root of 1628987715 is about 40360.7199514578. The cubic root of 1628987715 is about 1176.6282457243.

The spelling of 1628987715 in words is "one billion, six hundred twenty-eight million, nine hundred eighty-seven thousand, seven hundred fifteen".