698665344 has 128 divisors (see below), whose sum is σ = 2012623200. Its totient is φ = 213467136.

The previous prime is 698665309. The next prime is 698665351. The reversal of 698665344 is 443566896.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863212 + ... + 864020.

Almost surely, 2^698665344 is an apocalyptic number.

698665344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698665344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006311600).

698665344 is an abundant number, since it is smaller than the sum of its proper divisors (1313957856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698665344 is a wasteful number, since it uses less digits than its factorization.

698665344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1000 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 698665344 is about 26432.2784488965. The cubic root of 698665344 is about 887.3393349050.

The spelling of 698665344 in words is "six hundred ninety-eight million, six hundred sixty-five thousand, three hundred forty-four".