1629729234 has 80 divisors (see below), whose sum is σ = 4230872448. Its totient is φ = 459235008.

The previous prime is 1629729229. The next prime is 1629729271. The reversal of 1629729234 is 4329279261.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1629729234.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 72939 + ... + 92625.

Almost surely, 2^1629729234 is an apocalyptic number.

1629729234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1629729234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115436224).

1629729234 is an abundant number, since it is smaller than the sum of its proper divisors (2601143214).

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

1629729234 is a wasteful number, since it uses less digits than its factorization.

1629729234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19781 (or 19772 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1629729234 is about 40369.9050531457. The cubic root of 1629729234 is about 1176.8067532802.

The spelling of 1629729234 in words is "one billion, six hundred twenty-nine million, seven hundred twenty-nine thousand, two hundred thirty-four".