129089560 has 16 divisors (see below), whose sum is σ = 290451600. Its totient is φ = 51635808.

The previous prime is 129089539. The next prime is 129089561. The reversal of 129089560 is 65980921.

It is a super-2 number, since 2×129089560² = 33328229001987200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3227239 = 129089560 / (1 + 2 + 9 + 0 + 8 + 9 + 5 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129089561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1613580 + ... + 1613659.

It is an arithmetic number, because the mean of its divisors is an integer number (18153225).

Almost surely, 2^129089560 is an apocalyptic number.

129089560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129089560 is an abundant number, since it is smaller than the sum of its proper divisors (161362040).

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

129089560 is a wasteful number, since it uses less digits than its factorization.

129089560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227250 (or 3227246 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 129089560 is about 11361.7586666854. The cubic root of 129089560 is about 505.3943395753.

The spelling of 129089560 in words is "one hundred twenty-nine million, eighty-nine thousand, five hundred sixty".