129248208 has 30 divisors (see below), whose sum is σ = 361715874. Its totient is φ = 43082688.

The previous prime is 129248149. The next prime is 129248213. The reversal of 129248208 is 802842921.

It can be written as a sum of positive squares in only one way, i.e., 77580864 + 51667344 = 8808^2 + 7188^2 .

It is a super-2 number, since 2×129248208² = 33410198542422528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448635 + ... + 448922.

Almost surely, 2^129248208 is an apocalyptic number.

129248208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129248208 is an abundant number, since it is smaller than the sum of its proper divisors (232467666).

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

129248208 is a wasteful number, since it uses less digits than its factorization.

129248208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897571 (or 897562 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 129248208 is about 11368.7381885590. The cubic root of 129248208 is about 505.6012940268.

The spelling of 129248208 in words is "one hundred twenty-nine million, two hundred forty-eight thousand, two hundred eight".