129953488 has 60 divisors (see below), whose sum is σ = 302397312. Its totient is φ = 53887680.

The previous prime is 129953429. The next prime is 129953489. The reversal of 129953488 is 884359921.

It is a super-2 number, since 2×129953488² = 33775818086732288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21631 + ... + 26977.

Almost surely, 2^129953488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129953488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151198656).

129953488 is an abundant number, since it is smaller than the sum of its proper divisors (172443824).

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

129953488 is a wasteful number, since it uses less digits than its factorization.

129953488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400 (or 5387 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 129953488 is about 11399.7143823870. The cubic root of 129953488 is about 506.5192792288.

The spelling of 129953488 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, four hundred eighty-eight".