129240364 has 48 divisors (see below), whose sum is σ = 261015552. Its totient is φ = 55440000.

The previous prime is 129240329. The next prime is 129240389. The reversal of 129240364 is 463042921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54769 + ... + 57079.

It is an arithmetic number, because the mean of its divisors is an integer number (5437824).

Almost surely, 2^129240364 is an apocalyptic number.

It is an amenable number.

129240364 is an abundant number, since it is smaller than the sum of its proper divisors (131775188).

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

129240364 is a wasteful number, since it uses less digits than its factorization.

129240364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 129240364 is about 11368.3932022076. The cubic root of 129240364 is about 505.5910656018.

The spelling of 129240364 in words is "one hundred twenty-nine million, two hundred forty thousand, three hundred sixty-four".