698137680 has 160 divisors (see below), whose sum is σ = 2252891520. Its totient is φ = 178698240.

The previous prime is 698137663. The next prime is 698137681. The reversal of 698137680 is 86731896.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698137681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 628966 + ... + 630074.

It is an arithmetic number, because the mean of its divisors is an integer number (14080572).

Almost surely, 2^698137680 is an apocalyptic number.

698137680 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 698137680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126445760).

698137680 is an abundant number, since it is smaller than the sum of its proper divisors (1554753840).

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

698137680 is a wasteful number, since it uses less digits than its factorization.

698137680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 698137680 is about 26422.2951311955. The cubic root of 698137680 is about 887.1158922371.

The spelling of 698137680 in words is "six hundred ninety-eight million, one hundred thirty-seven thousand, six hundred eighty".