1629345912 has 128 divisors (see below), whose sum is σ = 4432320000. Its totient is φ = 497373696.

The previous prime is 1629345853. The next prime is 1629345919. The reversal of 1629345912 is 2195439261.

It is a super-2 number, since 2×1629345912² = 5309536201902223488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629345919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4538389 + ... + 4538747.

It is an arithmetic number, because the mean of its divisors is an integer number (34627500).

Almost surely, 2^1629345912 is an apocalyptic number.

1629345912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1629345912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216160000).

1629345912 is an abundant number, since it is smaller than the sum of its proper divisors (2802974088).

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

1629345912 is a wasteful number, since it uses less digits than its factorization.

1629345912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 1629345912 is about 40365.1571531686. The cubic root of 1629345912 is about 1176.7144820651.

The spelling of 1629345912 in words is "one billion, six hundred twenty-nine million, three hundred forty-five thousand, nine hundred twelve".