729980394 has 128 divisors (see below), whose sum is σ = 1818464256. Its totient is φ = 192192000.

The previous prime is 729980393. The next prime is 729980479. The reversal of 729980394 is 493089927.

It is not an unprimeable number, because it can be changed into a prime (729980393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1400854 + ... + 1401374.

It is an arithmetic number, because the mean of its divisors is an integer number (14206752).

Almost surely, 2^729980394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729980394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909232128).

729980394 is an abundant number, since it is smaller than the sum of its proper divisors (1088483862).

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

729980394 is a wasteful number, since it uses less digits than its factorization.

729980394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 729980394 is about 27018.1493444684. The cubic root of 729980394 is about 900.4032735945.

The spelling of 729980394 in words is "seven hundred twenty-nine million, nine hundred eighty thousand, three hundred ninety-four".