1378513226 has 8 divisors (see below), whose sum is σ = 2068683204. Its totient is φ = 688952160.

The previous prime is 1378513217. The next prime is 1378513247. The reversal of 1378513226 is 6223158731.

It can be written as a sum of positive squares in 2 ways, for example, as 1285294201 + 93219025 = 35851^2 + 9655^2 .

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

It is a super-4 number, since 4×1378513226⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378513226.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146525 + ... + 155648.

Almost surely, 2^1378513226 is an apocalyptic number.

1378513226 is a deficient number, since it is larger than the sum of its proper divisors (690169978).

1378513226 is a wasteful number, since it uses less digits than its factorization.

1378513226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304456.

The product of its digits is 60480, while the sum is 38.

The square root of 1378513226 is about 37128.3345438494. The cubic root of 1378513226 is about 1112.9363118969.

The spelling of 1378513226 in words is "one billion, three hundred seventy-eight million, five hundred thirteen thousand, two hundred twenty-six".