654698728 has 16 divisors (see below), whose sum is σ = 1228600260. Its totient is φ = 327072000.

The previous prime is 654698719. The next prime is 654698729. The reversal of 654698728 is 827896456.

It can be written as a sum of positive squares in 2 ways, for example, as 360164484 + 294534244 = 18978^2 + 17162^2 .

It is not an unprimeable number, because it can be changed into a prime (654698729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24463 + ... + 43678.

Almost surely, 2^654698728 is an apocalyptic number.

It is an amenable number.

654698728 is a deficient number, since it is larger than the sum of its proper divisors (573901532).

654698728 is a wasteful number, since it uses less digits than its factorization.

654698728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69348 (or 69344 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The square root of 654698728 is about 25587.0812716105. The cubic root of 654698728 is about 868.3213891943.

The spelling of 654698728 in words is "six hundred fifty-four million, six hundred ninety-eight thousand, seven hundred twenty-eight".