698809844 has 12 divisors (see below), whose sum is σ = 1236658500. Its totient is φ = 345478848.

The previous prime is 698809841. The next prime is 698809849. The reversal of 698809844 is 448908896.

It can be written as a sum of positive squares in 2 ways, for example, as 432140944 + 266668900 = 20788^2 + 16330^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 698809844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698809841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981119 + ... + 981830.

It is an arithmetic number, because the mean of its divisors is an integer number (103054875).

Almost surely, 2^698809844 is an apocalyptic number.

It is an amenable number.

698809844 is a deficient number, since it is larger than the sum of its proper divisors (537848656).

698809844 is a wasteful number, since it uses less digits than its factorization.

698809844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963042 (or 1963040 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 698809844 is about 26435.0117079603. The cubic root of 698809844 is about 887.4005047227.

The spelling of 698809844 in words is "six hundred ninety-eight million, eight hundred nine thousand, eight hundred forty-four".