688887030 has 128 divisors (see below), whose sum is σ = 1889879040. Its totient is φ = 159413760.

The previous prime is 688887029. The next prime is 688887041. The reversal of 688887030 is 30788886.

It is a super-4 number, since 4×688887030⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 546541 + ... + 547799.

It is an arithmetic number, because the mean of its divisors is an integer number (14764680).

Almost surely, 2^688887030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688887030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944939520).

688887030 is an abundant number, since it is smaller than the sum of its proper divisors (1200992010).

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

688887030 is a wasteful number, since it uses less digits than its factorization.

688887030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 688887030 is about 26246.6575014801. The cubic root of 688887030 is about 883.1802244025.

The spelling of 688887030 in words is "six hundred eighty-eight million, eight hundred eighty-seven thousand, thirty".