1628465369 has 4 divisors (see below), whose sum is σ = 1631288244. Its totient is φ = 1625642496.

The previous prime is 1628465317. The next prime is 1628465381. The reversal of 1628465369 is 9635648261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9635648261 = 66337 ⋅145253.

It can be written as a sum of positive squares in 2 ways, for example, as 789610000 + 838855369 = 28100^2 + 28963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1628465369 is a prime.

It is a super-2 number, since 2×1628465369² = 5303798916064612322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628465269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410572 + ... + 1411725.

It is an arithmetic number, because the mean of its divisors is an integer number (407822061).

Almost surely, 2^1628465369 is an apocalyptic number.

It is an amenable number.

1628465369 is a deficient number, since it is larger than the sum of its proper divisors (2822875).

1628465369 is an equidigital number, since it uses as much as digits as its factorization.

1628465369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822874.

The product of its digits is 1866240, while the sum is 50.

The square root of 1628465369 is about 40354.2484628323. The cubic root of 1628465369 is about 1176.5024676605.

The spelling of 1628465369 in words is "one billion, six hundred twenty-eight million, four hundred sixty-five thousand, three hundred sixty-nine".