274728381 has 16 divisors (see below), whose sum is σ = 389121408. Its totient is φ = 171814400.

The previous prime is 274728379. The next prime is 274728401. The reversal of 274728381 is 183827472.

It is a cyclic number.

It is not a de Polignac number, because 274728381 - 2¹ = 274728379 is a prime.

It is a super-2 number, since 2×274728381² = 150951366653762322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274728371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7201 + ... + 24521.

It is an arithmetic number, because the mean of its divisors is an integer number (24320088).

Almost surely, 2^274728381 is an apocalyptic number.

It is an amenable number.

274728381 is a deficient number, since it is larger than the sum of its proper divisors (114393027).

274728381 is a wasteful number, since it uses less digits than its factorization.

274728381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652.

The product of its digits is 150528, while the sum is 42.

The square root of 274728381 is about 16574.9323075541. The cubic root of 274728381 is about 650.0815526866.

Subtracting from 274728381 its reverse (183827472), we obtain a palindrome (90900909).

It can be divided in two parts, 27472 and 8381, that added together give a palindrome (35853).

The spelling of 274728381 in words is "two hundred seventy-four million, seven hundred twenty-eight thousand, three hundred eighty-one".