129493020 has 48 divisors (see below), whose sum is σ = 363313440. Its totient is φ = 34461696.

The previous prime is 129493019. The next prime is 129493027. The reversal of 129493020 is 20394921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129493027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32244 + ... + 36036.

It is an arithmetic number, because the mean of its divisors is an integer number (7569030).

Almost surely, 2^129493020 is an apocalyptic number.

129493020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 11379×11380.

It is an amenable number.

129493020 is an abundant number, since it is smaller than the sum of its proper divisors (233820420).

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

129493020 is a wasteful number, since it uses less digits than its factorization.

129493020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 129493020 is about 11379.4999890153. The cubic root of 129493020 is about 505.9203163644.

The spelling of 129493020 in words is "one hundred twenty-nine million, four hundred ninety-three thousand, twenty".