687252020 has 144 divisors (see below), whose sum is σ = 1845623808. Its totient is φ = 210263040.

The previous prime is 687252019. The next prime is 687252061. The reversal of 687252020 is 20252786.

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, 732992 + ... + 733928.

It is an arithmetic number, because the mean of its divisors is an integer number (12816832).

Almost surely, 2^687252020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687252020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922811904).

687252020 is an abundant number, since it is smaller than the sum of its proper divisors (1158371788).

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

687252020 is a wasteful number, since it uses less digits than its factorization.

687252020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 687252020 is about 26215.4919847025. The cubic root of 687252020 is about 882.4809552182.

The spelling of 687252020 in words is "six hundred eighty-seven million, two hundred fifty-two thousand, twenty".