687472830 has 96 divisors (see below), whose sum is σ = 1997599968. Its totient is φ = 162585600.

The previous prime is 687472813. The next prime is 687472861. The reversal of 687472830 is 38274786.

It is a happy number.

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

It is a congruent number.

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, 32122 + ... + 49058.

It is an arithmetic number, because the mean of its divisors is an integer number (20808333).

Almost surely, 2^687472830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687472830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998799984).

687472830 is an abundant number, since it is smaller than the sum of its proper divisors (1310127138).

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

687472830 is a wasteful number, since it uses less digits than its factorization.

687472830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17002 (or 16999 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 687472830 is about 26219.7030875637. The cubic root of 687472830 is about 882.5754570645.

The spelling of 687472830 in words is "six hundred eighty-seven million, four hundred seventy-two thousand, eight hundred thirty".