129036404 has 18 divisors (see below), whose sum is σ = 262681650. Its totient is φ = 55301232.

The previous prime is 129036377. The next prime is 129036431. The reversal of 129036404 is 404630921.

It is an interprime number because it is at equal distance from previous prime (129036377) and next prime (129036431).

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 60808804 = 8260^2 + 7798^2 .

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, 328979 + ... + 329370.

It is an arithmetic number, because the mean of its divisors is an integer number (14593425).

Almost surely, 2^129036404 is an apocalyptic number.

129036404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129036404 is an abundant number, since it is smaller than the sum of its proper divisors (133645246).

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

129036404 is a wasteful number, since it uses less digits than its factorization.

129036404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658367 (or 658358 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 129036404 is about 11359.4191752924. The cubic root of 129036404 is about 505.3249602757.

The spelling of 129036404 in words is "one hundred twenty-nine million, thirty-six thousand, four hundred four".