1628928915 has 16 divisors (see below), whose sum is σ = 2611926528. Its totient is φ = 866882016.

The previous prime is 1628928911. The next prime is 1628928923. The reversal of 1628928915 is 5198298261.

It is not a de Polignac number, because 1628928915 - 2² = 1628928911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1628928911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110329 + ... + 124218.

It is an arithmetic number, because the mean of its divisors is an integer number (163245408).

Almost surely, 2^1628928915 is an apocalyptic number.

1628928915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1628928915 is a deficient number, since it is larger than the sum of its proper divisors (982997613).

1628928915 is a wasteful number, since it uses less digits than its factorization.

1628928915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235018.

The product of its digits is 622080, while the sum is 51.

The square root of 1628928915 is about 40359.9915138742. The cubic root of 1628928915 is about 1176.6140883485.

The spelling of 1628928915 in words is "one billion, six hundred twenty-eight million, nine hundred twenty-eight thousand, nine hundred fifteen".