687050406 has 24 divisors (see below), whose sum is σ = 1701267984. Its totient is φ = 196300080.

The previous prime is 687050389. The next prime is 687050443. The reversal of 687050406 is 604050786.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2726265 + ... + 2726516.

It is an arithmetic number, because the mean of its divisors is an integer number (70886166).

Almost surely, 2^687050406 is an apocalyptic number.

687050406 is an abundant number, since it is smaller than the sum of its proper divisors (1014217578).

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

687050406 is a wasteful number, since it uses less digits than its factorization.

687050406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452796 (or 5452793 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 687050406 is about 26211.6463809506. The cubic root of 687050406 is about 882.3946511593.

The spelling of 687050406 in words is "six hundred eighty-seven million, fifty thousand, four hundred six".