129894570 has 128 divisors (see below), whose sum is σ = 389491200. Its totient is φ = 30564864.

The previous prime is 129894563. The next prime is 129894581. The reversal of 129894570 is 75498921.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79926 + ... + 81534.

It is an arithmetic number, because the mean of its divisors is an integer number (3042900).

Almost surely, 2^129894570 is an apocalyptic number.

129894570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129894570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194745600).

129894570 is an abundant number, since it is smaller than the sum of its proper divisors (259596630).

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

129894570 is a wasteful number, since it uses less digits than its factorization.

129894570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 129894570 is about 11397.1299018656. The cubic root of 129894570 is about 506.4427194931.

The spelling of 129894570 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, five hundred seventy".