687429630 has 48 divisors (see below), whose sum is σ = 1848955680. Its totient is φ = 176992704.

The previous prime is 687429607. The next prime is 687429637. The reversal of 687429630 is 36924786.

687429630 is a `hidden beast` number, since 6 + 8 + 7 + 4 + 2 + 9 + 630 = 666.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687429637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129082 + ... + 134301.

It is an arithmetic number, because the mean of its divisors is an integer number (38519910).

Almost surely, 2^687429630 is an apocalyptic number.

687429630 is an abundant number, since it is smaller than the sum of its proper divisors (1161526050).

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

687429630 is a wasteful number, since it uses less digits than its factorization.

687429630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263425 (or 263422 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 687429630 is about 26218.8792666658. The cubic root of 687429630 is about 882.5569700025.

The spelling of 687429630 in words is "six hundred eighty-seven million, four hundred twenty-nine thousand, six hundred thirty".