687061272 has 64 divisors (see below), whose sum is σ = 1820296800. Its totient is φ = 215720960.

The previous prime is 687061259. The next prime is 687061283. The reversal of 687061272 is 272160786.

687061272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 687061272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16498 + ... + 40574.

Almost surely, 2^687061272 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 687061272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910148400).

687061272 is an abundant number, since it is smaller than the sum of its proper divisors (1133235528).

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

687061272 is a wasteful number, since it uses less digits than its factorization.

687061272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24156 (or 24152 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 687061272 is about 26211.8536544061. The cubic root of 687061272 is about 882.3993029527.

The spelling of 687061272 in words is "six hundred eighty-seven million, sixty-one thousand, two hundred seventy-two".