698391720 has 192 divisors, whose sum is σ = 2535361920. Its totient is φ = 171880704.

The previous prime is 698391709. The next prime is 698391737. The reversal of 698391720 is 27193896.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123597 + ... + 129123.

It is an arithmetic number, because the mean of its divisors is an integer number (13205010).

Almost surely, 2^698391720 is an apocalyptic number.

698391720 is a gapful number since it is divisible by the number (60) 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 698391720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267680960).

698391720 is an abundant number, since it is smaller than the sum of its proper divisors (1836970200).

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

698391720 is a wasteful number, since it uses less digits than its factorization.

698391720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566 (or 5550 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 698391720 is about 26427.1019977598. The cubic root of 698391720 is about 887.2234811354.

The spelling of 698391720 in words is "six hundred ninety-eight million, three hundred ninety-one thousand, seven hundred twenty".