274531866 has 64 divisors (see below), whose sum is σ = 651442176. Its totient is φ = 75499200.

The previous prime is 274531819. The next prime is 274531871. The reversal of 274531866 is 668135472.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 127156 + ... + 129296.

It is an arithmetic number, because the mean of its divisors is an integer number (10178784).

Almost surely, 2^274531866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 274531866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325721088).

274531866 is an abundant number, since it is smaller than the sum of its proper divisors (376910310).

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

274531866 is a wasteful number, since it uses less digits than its factorization.

274531866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its digits is 241920, while the sum is 42.

The square root of 274531866 is about 16569.0031685675. The cubic root of 274531866 is about 649.9265131912.

The spelling of 274531866 in words is "two hundred seventy-four million, five hundred thirty-one thousand, eight hundred sixty-six".