687228148 has 6 divisors (see below), whose sum is σ = 1202649266. Its totient is φ = 343614072.

The previous prime is 687228137. The next prime is 687228161. The reversal of 687228148 is 841822786.

It is a happy number.

687228148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 479522404 + 207705744 = 21898^2 + 14412^2 .

It is a super-3 number, since 3×687228148³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687228098 and 687228107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85903515 + ... + 85903522.

Almost surely, 2^687228148 is an apocalyptic number.

It is an amenable number.

687228148 is a deficient number, since it is larger than the sum of its proper divisors (515421118).

687228148 is a wasteful number, since it uses less digits than its factorization.

687228148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171807041 (or 171807039 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 687228148 is about 26215.0366774491. The cubic root of 687228148 is about 882.4707373124.

The spelling of 687228148 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, one hundred forty-eight".