729870842 has 8 divisors (see below), whose sum is σ = 1104495156. Its totient is φ = 361705792.

The previous prime is 729870839. The next prime is 729870857. The reversal of 729870842 is 248078927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 655411201 + 74459641 = 25601^2 + 8629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×729870842² = 1065422892003577928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614533 + ... + 1614984.

Almost surely, 2^729870842 is an apocalyptic number.

729870842 is a deficient number, since it is larger than the sum of its proper divisors (374624314).

729870842 is a wasteful number, since it uses less digits than its factorization.

729870842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229632.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 729870842 is about 27016.1218904564. The cubic root of 729870842 is about 900.3582285881.

The spelling of 729870842 in words is "seven hundred twenty-nine million, eight hundred seventy thousand, eight hundred forty-two".