129284896 has 24 divisors (see below), whose sum is σ = 274109724. Its totient is φ = 59669760.

The previous prime is 129284893. The next prime is 129284923. The reversal of 129284896 is 698482921.

It can be written as a sum of positive squares in 2 ways, for example, as 129140496 + 144400 = 11364^2 + 380^2 .

It is not an unprimeable number, because it can be changed into a prime (129284893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154975 + ... + 155806.

Almost surely, 2^129284896 is an apocalyptic number.

129284896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129284896 is an abundant number, since it is smaller than the sum of its proper divisors (144824828).

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

129284896 is a wasteful number, since it uses less digits than its factorization.

129284896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310804 (or 310796 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 129284896 is about 11370.3516216518. The cubic root of 129284896 is about 505.6491289786.

The spelling of 129284896 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, eight hundred ninety-six".