129853040 has 20 divisors (see below), whose sum is σ = 301908504. Its totient is φ = 51941184.

The previous prime is 129853037. The next prime is 129853063. The reversal of 129853040 is 40358921.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 129852988 and 129853006.

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, 811502 + ... + 811661.

Almost surely, 2^129853040 is an apocalyptic number.

129853040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129853040 is an abundant number, since it is smaller than the sum of its proper divisors (172055464).

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

129853040 is a wasteful number, since it uses less digits than its factorization.

129853040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623176 (or 1623170 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 129853040 is about 11395.3078062859. The cubic root of 129853040 is about 506.3887403107.

The spelling of 129853040 in words is "one hundred twenty-nine million, eight hundred fifty-three thousand, forty".