698728869 has 16 divisors (see below), whose sum is σ = 1037232000. Its totient is φ = 464884128.

The previous prime is 698728853. The next prime is 698728879. The reversal of 698728869 is 968827896.

It is not a de Polignac number, because 698728869 - 2⁴ = 698728853 is a prime.

It is a super-2 number, since 2×698728869² = 976444064748038322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698728879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12144 + ... + 39305.

It is an arithmetic number, because the mean of its divisors is an integer number (64827000).

Almost surely, 2^698728869 is an apocalyptic number.

It is an amenable number.

698728869 is a deficient number, since it is larger than the sum of its proper divisors (338503131).

698728869 is a wasteful number, since it uses less digits than its factorization.

698728869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51961 (or 51955 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 698728869 is about 26433.4800773564. The cubic root of 698728869 is about 887.3662273810.

The spelling of 698728869 in words is "six hundred ninety-eight million, seven hundred twenty-eight thousand, eight hundred sixty-nine".