1378514378 has 4 divisors (see below), whose sum is σ = 2067771570. Its totient is φ = 689257188.

The previous prime is 1378514369. The next prime is 1378514383. The reversal of 1378514378 is 8734158731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8734158731 = 17 ⋅513774043.

It can be written as a sum of positive squares in only one way, i.e., 1118434249 + 260080129 = 33443^2 + 16127^2 .

It is a super-4 number, since 4×1378514378⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344628593 + ... + 344628596.

Almost surely, 2^1378514378 is an apocalyptic number.

1378514378 is a deficient number, since it is larger than the sum of its proper divisors (689257192).

1378514378 is an equidigital number, since it uses as much as digits as its factorization.

1378514378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689257191.

The product of its digits is 564480, while the sum is 47.

The square root of 1378514378 is about 37128.3500576042. The cubic root of 1378514378 is about 1112.9366219175.

The spelling of 1378514378 in words is "one billion, three hundred seventy-eight million, five hundred fourteen thousand, three hundred seventy-eight".