129473400 has 192 divisors, whose sum is σ = 474969600. Its totient is φ = 28546560.

The previous prime is 129473381. The next prime is 129473423. The reversal of 129473400 is 4374921.

It is a happy number.

It is a super-2 number, since 2×129473400² = 33526722615120000, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121269 + ... + 122331.

It is an arithmetic number, because the mean of its divisors is an integer number (2473800).

Almost surely, 2^129473400 is an apocalyptic number.

129473400 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 129473400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237484800).

129473400 is an abundant number, since it is smaller than the sum of its proper divisors (345496200).

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

129473400 is a wasteful number, since it uses less digits than its factorization.

129473400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 129473400 is about 11378.6378798167. The cubic root of 129473400 is about 505.8947637439.

The spelling of 129473400 in words is "one hundred twenty-nine million, four hundred seventy-three thousand, four hundred".