729129450 has 48 divisors (see below), whose sum is σ = 2066564160. Its totient is φ = 166657920.

The previous prime is 729129419. The next prime is 729129451. The reversal of 729129450 is 54921927.

It is a junction number, because it is equal to n+sod(n) for n = 729129399 and 729129408.

It is not an unprimeable number, because it can be changed into a prime (729129451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346155 + ... + 348254.

It is an arithmetic number, because the mean of its divisors is an integer number (43053420).

Almost surely, 2^729129450 is an apocalyptic number.

729129450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

729129450 is an abundant number, since it is smaller than the sum of its proper divisors (1337434710).

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

729129450 is a wasteful number, since it uses less digits than its factorization.

729129450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694431 (or 694426 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 729129450 is about 27002.3971158118. The cubic root of 729129450 is about 900.0532684521.

The spelling of 729129450 in words is "seven hundred twenty-nine million, one hundred twenty-nine thousand, four hundred fifty".