1628916393 has 8 divisors (see below), whose sum is σ = 2338956928. Its totient is φ = 1002410064.

The previous prime is 1628916391. The next prime is 1628916409. The reversal of 1628916393 is 3936198261.

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

It is not a de Polignac number, because 1628916393 - 2¹ = 1628916391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628916391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20883505 + ... + 20883582.

It is an arithmetic number, because the mean of its divisors is an integer number (292369616).

Almost surely, 2^1628916393 is an apocalyptic number.

1628916393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1628916393 is a deficient number, since it is larger than the sum of its proper divisors (710040535).

1628916393 is a wasteful number, since it uses less digits than its factorization.

1628916393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41767103.

The product of its digits is 419904, while the sum is 48.

The square root of 1628916393 is about 40359.8363847030. The cubic root of 1628916393 is about 1176.6110733614.

The spelling of 1628916393 in words is "one billion, six hundred twenty-eight million, nine hundred sixteen thousand, three hundred ninety-three".