129774000 has 160 divisors (see below), whose sum is σ = 428972544. Its totient is φ = 33734400.

The previous prime is 129773999. The next prime is 129774019. The reversal of 129774000 is 477921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257749 + ... + 258251.

Almost surely, 2^129774000 is an apocalyptic number.

129774000 is a gapful number since it is divisible by the number (10) 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 129774000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214486272).

129774000 is an abundant number, since it is smaller than the sum of its proper divisors (299198544).

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

129774000 is a wasteful number, since it uses less digits than its factorization.

129774000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 129774000 is about 11391.8391842582. The cubic root of 129774000 is about 506.2859751908.

The spelling of 129774000 in words is "one hundred twenty-nine million, seven hundred seventy-four thousand".