687422700 has 108 divisors (see below), whose sum is σ = 2234570520. Its totient is φ = 183306240.

The previous prime is 687422657. The next prime is 687422707. The reversal of 687422700 is 7224786.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (687422707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10156 + ... + 38444.

Almost surely, 2^687422700 is an apocalyptic number.

687422700 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 687422700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1117285260).

687422700 is an abundant number, since it is smaller than the sum of its proper divisors (1547147820).

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

687422700 is a wasteful number, since it uses less digits than its factorization.

687422700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28318 (or 28299 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 687422700 is about 26218.7471096542. The cubic root of 687422700 is about 882.5540042976.

The spelling of 687422700 in words is "six hundred eighty-seven million, four hundred twenty-two thousand, seven hundred".