729725478 has 24 divisors (see below), whose sum is σ = 1491190872. Its totient is φ = 238062144.

The previous prime is 729725467. The next prime is 729725519. The reversal of 729725478 is 874527927.

It is a self number, because there is not a number n which added to its sum of digits gives 729725478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14275 + ... + 40782.

It is an arithmetic number, because the mean of its divisors is an integer number (62132953).

Almost surely, 2^729725478 is an apocalyptic number.

729725478 is an abundant number, since it is smaller than the sum of its proper divisors (761465394).

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

729725478 is a wasteful number, since it uses less digits than its factorization.

729725478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55156 (or 55109 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 51.

The square root of 729725478 is about 27013.4314369722. The cubic root of 729725478 is about 900.2984516359.

The spelling of 729725478 in words is "seven hundred twenty-nine million, seven hundred twenty-five thousand, four hundred seventy-eight".