129248378 has 12 divisors (see below), whose sum is σ = 225525402. Its totient is φ = 55392120.

The previous prime is 129248369. The next prime is 129248401. The reversal of 129248378 is 873842921.

It can be written as a sum of positive squares in only one way, i.e., 126855169 + 2393209 = 11263^2 + 1547^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 659333 + ... + 659528.

Almost surely, 2^129248378 is an apocalyptic number.

129248378 is a deficient number, since it is larger than the sum of its proper divisors (96277024).

129248378 is a wasteful number, since it uses less digits than its factorization.

129248378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318877 (or 1318870 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 129248378 is about 11368.7456651998. The cubic root of 129248378 is about 505.6015156989.

The spelling of 129248378 in words is "one hundred twenty-nine million, two hundred forty-eight thousand, three hundred seventy-eight".