698297128 has 8 divisors (see below), whose sum is σ = 1309307130. Its totient is φ = 349148560.

The previous prime is 698297077. The next prime is 698297143. The reversal of 698297128 is 821792896.

698297128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 654234084 + 44063044 = 25578^2 + 6638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43643563 + ... + 43643578.

Almost surely, 2^698297128 is an apocalyptic number.

It is an amenable number.

698297128 is a deficient number, since it is larger than the sum of its proper divisors (611010002).

698297128 is a wasteful number, since it uses less digits than its factorization.

698297128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87287147 (or 87287143 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 698297128 is about 26425.3122592714. The cubic root of 698297128 is about 887.1834233711.

The spelling of 698297128 in words is "six hundred ninety-eight million, two hundred ninety-seven thousand, one hundred twenty-eight".