274428643 has 8 divisors (see below), whose sum is σ = 276171840. Its totient is φ = 272690880.

The previous prime is 274428631. The next prime is 274428677. The reversal of 274428643 is 346824472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 274428643 - 2²¹ = 272331491 is a prime.

It is a super-2 number, since 2×274428643² = 150622160197642898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 274428596 and 274428605.

It is not an unprimeable number, because it can be changed into a prime (274425643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146533 + ... + 148393.

It is an arithmetic number, because the mean of its divisors is an integer number (34521480).

Almost surely, 2^274428643 is an apocalyptic number.

274428643 is a deficient number, since it is larger than the sum of its proper divisors (1743197).

274428643 is a wasteful number, since it uses less digits than its factorization.

274428643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717.

The product of its digits is 258048, while the sum is 40.

The square root of 274428643 is about 16565.8879327370. The cubic root of 274428643 is about 649.8450462982.

The spelling of 274428643 in words is "two hundred seventy-four million, four hundred twenty-eight thousand, six hundred forty-three".