1628699969 has 8 divisors (see below), whose sum is σ = 1846299840. Its totient is φ = 1424288016.

The previous prime is 1628699951. The next prime is 1628699981. The reversal of 1628699969 is 9699968261.

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

It is a cyclic number.

It is not a de Polignac number, because 1628699969 - 2¹⁶ = 1628634433 is a prime.

It is a super-2 number, since 2×1628699969² = 5305327178041201922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628699269) 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, 3296717 + ... + 3297210.

It is an arithmetic number, because the mean of its divisors is an integer number (230787480).

Almost surely, 2^1628699969 is an apocalyptic number.

1628699969 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1628699969 is a deficient number, since it is larger than the sum of its proper divisors (217599871).

1628699969 is a wasteful number, since it uses less digits than its factorization.

1628699969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593959.

The product of its digits is 22674816, while the sum is 65.

The square root of 1628699969 is about 40357.1551152952. The cubic root of 1628699969 is about 1176.5589613859.

The spelling of 1628699969 in words is "one billion, six hundred twenty-eight million, six hundred ninety-nine thousand, nine hundred sixty-nine".