129467820 has 24 divisors (see below), whose sum is σ = 362510064. Its totient is φ = 34524736.

The previous prime is 129467813. The next prime is 129467827. The reversal of 129467820 is 28764921.

It is an interprime number because it is at equal distance from previous prime (129467813) and next prime (129467827).

It is not an unprimeable number, because it can be changed into a prime (129467827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078839 + ... + 1078958.

It is an arithmetic number, because the mean of its divisors is an integer number (15104586).

Almost surely, 2^129467820 is an apocalyptic number.

129467820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129467820 is an abundant number, since it is smaller than the sum of its proper divisors (233042244).

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

129467820 is a wasteful number, since it uses less digits than its factorization.

129467820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157809 (or 2157807 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 129467820 is about 11378.3926808667. The cubic root of 129467820 is about 505.8874960134.

The spelling of 129467820 in words is "one hundred twenty-nine million, four hundred sixty-seven thousand, eight hundred twenty".