707728057 has 4 divisors (see below), whose sum is σ = 716686720. Its totient is φ = 698769396.

The previous prime is 707728033. The next prime is 707728061. The reversal of 707728057 is 750827707.

707728057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 707728057 - 2¹¹ = 707726009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (707728457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4479213 + ... + 4479370.

It is an arithmetic number, because the mean of its divisors is an integer number (179171680).

Almost surely, 2^707728057 is an apocalyptic number.

It is an amenable number.

707728057 is a deficient number, since it is larger than the sum of its proper divisors (8958663).

707728057 is an equidigital number, since it uses as much as digits as its factorization.

707728057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8958662.

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 707728057 is about 26603.1587786112. The cubic root of 707728057 is about 891.1595612533.

The spelling of 707728057 in words is "seven hundred seven million, seven hundred twenty-eight thousand, fifty-seven".