687749412 has 96 divisors (see below), whose sum is σ = 1879282944. Its totient is φ = 191692800.

The previous prime is 687749411. The next prime is 687749417. The reversal of 687749412 is 214947786.

687749412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (687749411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1072612 + ... + 1073252.

It is an arithmetic number, because the mean of its divisors is an integer number (19575864).

Almost surely, 2^687749412 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 687749412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939641472).

687749412 is an abundant number, since it is smaller than the sum of its proper divisors (1191533532).

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

687749412 is a wasteful number, since it uses less digits than its factorization.

687749412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 947 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 687749412 is about 26224.9768732024. The cubic root of 687749412 is about 882.6937995628.

The spelling of 687749412 in words is "six hundred eighty-seven million, seven hundred forty-nine thousand, four hundred twelve".