1378533274 has 8 divisors (see below), whose sum is σ = 2068273620. Its totient is φ = 689108736.

The previous prime is 1378533269. The next prime is 1378533287. The reversal of 1378533274 is 4723358731.

It can be written as a sum of positive squares in 2 ways, for example, as 976250025 + 402283249 = 31245^2 + 20057^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1378533274.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67719 + ... + 85690.

Almost surely, 2^1378533274 is an apocalyptic number.

1378533274 is a deficient number, since it is larger than the sum of its proper divisors (689740346).

1378533274 is a wasteful number, since it uses less digits than its factorization.

1378533274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157904.

The product of its digits is 423360, while the sum is 43.

The square root of 1378533274 is about 37128.6045253521. The cubic root of 1378533274 is about 1112.9417070910.

The spelling of 1378533274 in words is "one billion, three hundred seventy-eight million, five hundred thirty-three thousand, two hundred seventy-four".