729612978 has 16 divisors (see below), whose sum is σ = 1460223840. Its totient is φ = 243038016.

The previous prime is 729612971. The next prime is 729612997. The reversal of 729612978 is 879216927.

729612978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 729612978.

It is not an unprimeable number, because it can be changed into a prime (729612971) 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, 31900 + ... + 49767.

It is an arithmetic number, because the mean of its divisors is an integer number (91263990).

Almost surely, 2^729612978 is an apocalyptic number.

729612978 is an abundant number, since it is smaller than the sum of its proper divisors (730610862).

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

729612978 is a wasteful number, since it uses less digits than its factorization.

729612978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83161.

The product of its digits is 762048, while the sum is 51.

The square root of 729612978 is about 27011.3490592380. The cubic root of 729612978 is about 900.2521836515.

The spelling of 729612978 in words is "seven hundred twenty-nine million, six hundred twelve thousand, nine hundred seventy-eight".