1378433377 has 8 divisors (see below), whose sum is σ = 1401890336. Its totient is φ = 1355100192.

The previous prime is 1378433363. The next prime is 1378433429. The reversal of 1378433377 is 7733348731.

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 1378433377 - 2¹⁵ = 1378400609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378433347) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8343 + ... + 53164.

It is an arithmetic number, because the mean of its divisors is an integer number (175236292).

Almost surely, 2^1378433377 is an apocalyptic number.

It is an amenable number.

1378433377 is a deficient number, since it is larger than the sum of its proper divisors (23456959).

1378433377 is an equidigital number, since it uses as much as digits as its factorization.

1378433377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61887.

The product of its digits is 889056, while the sum is 46.

The square root of 1378433377 is about 37127.2592174537. The cubic root of 1378433377 is about 1112.9148229077.

The spelling of 1378433377 in words is "one billion, three hundred seventy-eight million, four hundred thirty-three thousand, three hundred seventy-seven".