1628238365 has 16 divisors (see below), whose sum is σ = 2117600688. Its totient is φ = 1194725376.

The previous prime is 1628238341. The next prime is 1628238373. The reversal of 1628238365 is 5638328261.

It can be written as a sum of positive squares in 8 ways, for example, as 158206084 + 1470032281 = 12578^2 + 38341^2 .

It is not a de Polignac number, because 1628238365 - 2¹⁰ = 1628237341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69572 + ... + 89981.

It is an arithmetic number, because the mean of its divisors is an integer number (132350043).

Almost surely, 2^1628238365 is an apocalyptic number.

It is an amenable number.

1628238365 is a deficient number, since it is larger than the sum of its proper divisors (489362323).

1628238365 is a wasteful number, since it uses less digits than its factorization.

1628238365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159728.

The product of its digits is 414720, while the sum is 44.

The square root of 1628238365 is about 40351.4357241474. The cubic root of 1628238365 is about 1176.4477979529.

The spelling of 1628238365 in words is "one billion, six hundred twenty-eight million, two hundred thirty-eight thousand, three hundred sixty-five".