698401728 has 84 divisors (see below), whose sum is σ = 2066470848. Its totient is φ = 225285120.

The previous prime is 698401687. The next prime is 698401729. The reversal of 698401728 is 827104896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698401729) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1701 + ... + 37412.

Almost surely, 2^698401728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698401728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1033235424).

698401728 is an abundant number, since it is smaller than the sum of its proper divisors (1368069120).

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

698401728 is a wasteful number, since it uses less digits than its factorization.

698401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39162 (or 39149 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 698401728 is about 26427.2913481499. The cubic root of 698401728 is about 887.2277191058.

The spelling of 698401728 in words is "six hundred ninety-eight million, four hundred one thousand, seven hundred twenty-eight".