129519380 has 12 divisors (see below), whose sum is σ = 271990740. Its totient is φ = 51807744.

The previous prime is 129519373. The next prime is 129519419. The reversal of 129519380 is 83915921.

It can be written as a sum of positive squares in 2 ways, for example, as 73479184 + 56040196 = 8572^2 + 7486^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3237965 + ... + 3238004.

It is an arithmetic number, because the mean of its divisors is an integer number (22665895).

Almost surely, 2^129519380 is an apocalyptic number.

129519380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129519380 is an abundant number, since it is smaller than the sum of its proper divisors (142471360).

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

129519380 is a wasteful number, since it uses less digits than its factorization.

129519380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475978 (or 6475976 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 129519380 is about 11380.6581532001. The cubic root of 129519380 is about 505.9546429371.

The spelling of 129519380 in words is "one hundred twenty-nine million, five hundred nineteen thousand, three hundred eighty".