729338400 has 432 divisors, whose sum is σ = 3046680000. Its totient is φ = 160634880.

The previous prime is 729338377. The next prime is 729338479. The reversal of 729338400 is 4833927.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1461351 + ... + 1461849.

It is an arithmetic number, because the mean of its divisors is an integer number (7052500).

Almost surely, 2^729338400 is an apocalyptic number.

729338400 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729338400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523340000).

729338400 is an abundant number, since it is smaller than the sum of its proper divisors (2317341600).

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

729338400 is a wasteful number, since it uses less digits than its factorization.

729338400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 729338400 is about 27006.2659395926. The cubic root of 729338400 is about 900.1392377169.

The spelling of 729338400 in words is "seven hundred twenty-nine million, three hundred thirty-eight thousand, four hundred".