1629212980 has 12 divisors (see below), whose sum is σ = 3421347300. Its totient is φ = 651685184.

The previous prime is 1629212929. The next prime is 1629212987. The reversal of 1629212980 is 892129261.

It can be written as a sum of positive squares in 2 ways, for example, as 455054224 + 1174158756 = 21332^2 + 34266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629212987) 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, 40730305 + ... + 40730344.

It is an arithmetic number, because the mean of its divisors is an integer number (285112275).

Almost surely, 2^1629212980 is an apocalyptic number.

1629212980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1629212980 is an abundant number, since it is smaller than the sum of its proper divisors (1792134320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1629212980 is a wasteful number, since it uses less digits than its factorization.

1629212980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81460658 (or 81460656 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1629212980 is about 40363.5105014418. The cubic root of 1629212980 is about 1176.6824800078.

The spelling of 1629212980 in words is "one billion, six hundred twenty-nine million, two hundred twelve thousand, nine hundred eighty".