729775898 has 16 divisors (see below), whose sum is σ = 1196446464. Its totient is φ = 332345280.

The previous prime is 729775889. The next prime is 729775931. The reversal of 729775898 is 898577927.

It is a super-2 number, since 2×729775898² = 1065145722603412808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 729775898.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345140 + ... + 347247.

It is an arithmetic number, because the mean of its divisors is an integer number (74777904).

Almost surely, 2^729775898 is an apocalyptic number.

729775898 is a deficient number, since it is larger than the sum of its proper divisors (466670566).

729775898 is a wasteful number, since it uses less digits than its factorization.

729775898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692437.

The product of its digits is 17781120, while the sum is 62.

The square root of 729775898 is about 27014.3646603062. The cubic root of 729775898 is about 900.3191863752.

The spelling of 729775898 in words is "seven hundred twenty-nine million, seven hundred seventy-five thousand, eight hundred ninety-eight".