1628684047 has 4 divisors (see below), whose sum is σ = 1714404280. Its totient is φ = 1542963816.

The previous prime is 1628684023. The next prime is 1628684059. The reversal of 1628684047 is 7404868261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1628684047 is a prime.

It is a super-2 number, since 2×1628684047² = 5305223449904596418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1628683988 and 1628684006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628684077) 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 3 ways as a sum of consecutive naturals, for example, 42860088 + ... + 42860125.

It is an arithmetic number, because the mean of its divisors is an integer number (428601070).

Almost surely, 2^1628684047 is an apocalyptic number.

1628684047 is a deficient number, since it is larger than the sum of its proper divisors (85720233).

1628684047 is an equidigital number, since it uses as much as digits as its factorization.

1628684047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85720232.

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 1628684047 is about 40356.9578511562. The cubic root of 1628684047 is about 1176.5551274010. Note that the first 3 decimals are identical.

The spelling of 1628684047 in words is "one billion, six hundred twenty-eight million, six hundred eighty-four thousand, forty-seven".