274645728 has 120 divisors (see below), whose sum is σ = 923175792. Its totient is φ = 78465024.

The previous prime is 274645673. The next prime is 274645739. The reversal of 274645728 is 827546472.

It is a happy number.

274645728 is a `hidden beast` number, since 2 + 74 + 6 + 4 + 572 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10576 + ... + 25712.

Almost surely, 2^274645728 is an apocalyptic number.

274645728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 274645728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461587896).

274645728 is an abundant number, since it is smaller than the sum of its proper divisors (648530064).

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

274645728 is a wasteful number, since it uses less digits than its factorization.

274645728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166 (or 15149 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 274645728 is about 16572.4388066452. The cubic root of 274645728 is about 650.0163530403.

The spelling of 274645728 in words is "two hundred seventy-four million, six hundred forty-five thousand, seven hundred twenty-eight".