1629644452 has 6 divisors (see below), whose sum is σ = 2851877798. Its totient is φ = 814822224.

The previous prime is 1629644447. The next prime is 1629644509. The reversal of 1629644452 is 2544469261.

It can be written as a sum of positive squares in only one way, i.e., 1025664676 + 603979776 = 32026^2 + 24576^2 .

It is a super-3 number, since 3×1629644452³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1629644399 and 1629644408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203705553 + ... + 203705560.

Almost surely, 2^1629644452 is an apocalyptic number.

It is an amenable number.

1629644452 is a deficient number, since it is larger than the sum of its proper divisors (1222233346).

1629644452 is a wasteful number, since it uses less digits than its factorization.

1629644452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407411117 (or 407411115 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 1629644452 is about 40368.8549750919. The cubic root of 1629644452 is about 1176.7863462583.

The spelling of 1629644452 in words is "one billion, six hundred twenty-nine million, six hundred forty-four thousand, four hundred fifty-two".