1628063021 has 12 divisors (see below), whose sum is σ = 1866637332. Its totient is φ = 1414423296.

The previous prime is 1628062999. The next prime is 1628063029. The reversal of 1628063021 is 1203608261.

It can be written as a sum of positive squares in 6 ways, for example, as 22458121 + 1605604900 = 4739^2 + 40070^2 .

It is not a de Polignac number, because 1628063021 - 2¹⁰ = 1628061997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628063029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280466 + ... + 286211.

It is an arithmetic number, because the mean of its divisors is an integer number (155553111).

Almost surely, 2^1628063021 is an apocalyptic number.

It is an amenable number.

1628063021 is a deficient number, since it is larger than the sum of its proper divisors (238574311).

1628063021 is a wasteful number, since it uses less digits than its factorization.

1628063021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566720 (or 566707 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1628063021 is about 40349.2629548546. The cubic root of 1628063021 is about 1176.4055661207.

The spelling of 1628063021 in words is "one billion, six hundred twenty-eight million, sixty-three thousand, twenty-one".