687474810 has 128 divisors (see below), whose sum is σ = 2017509120. Its totient is φ = 166573440.

The previous prime is 687474803. The next prime is 687474829. The reversal of 687474810 is 18474786.

It is a super-2 number, since 2×687474810² = 945243228769072200, which contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 358414 + ... + 360326.

It is an arithmetic number, because the mean of its divisors is an integer number (15761790).

Almost surely, 2^687474810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687474810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008754560).

687474810 is an abundant number, since it is smaller than the sum of its proper divisors (1330034310).

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

687474810 is a wasteful number, since it uses less digits than its factorization.

687474810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 687474810 is about 26219.7408454012. The cubic root of 687474810 is about 882.5763043696.

The spelling of 687474810 in words is "six hundred eighty-seven million, four hundred seventy-four thousand, eight hundred ten".