275977728 has 240 divisors, whose sum is σ = 911566656. Its totient is φ = 79626240.

The previous prime is 275977727. The next prime is 275977729. The reversal of 275977728 is 827779572.

275977728 is a `hidden beast` number, since 27 + 597 + 7 + 7 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (275977727) and next prime (275977729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275977721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1018233 + ... + 1018503.

Almost surely, 2^275977728 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 275977728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455783328).

275977728 is an abundant number, since it is smaller than the sum of its proper divisors (635588928).

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

275977728 is a wasteful number, since it uses less digits than its factorization.

275977728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 306 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The square root of 275977728 is about 16612.5774038829. The cubic root of 275977728 is about 651.0654934922.

The spelling of 275977728 in words is "two hundred seventy-five million, nine hundred seventy-seven thousand, seven hundred twenty-eight".