1378431135 has 16 divisors (see below), whose sum is σ = 2450544480. Its totient is φ = 735163200.

The previous prime is 1378431127. The next prime is 1378431143. The reversal of 1378431135 is 5311348731.

It is an interprime number because it is at equal distance from previous prime (1378431127) and next prime (1378431143).

It is not a de Polignac number, because 1378431135 - 2³ = 1378431127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378431135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5105166 + ... + 5105435.

It is an arithmetic number, because the mean of its divisors is an integer number (153159030).

Almost surely, 2^1378431135 is an apocalyptic number.

1378431135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1378431135 is a deficient number, since it is larger than the sum of its proper divisors (1072113345).

1378431135 is a wasteful number, since it uses less digits than its factorization.

1378431135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210615 (or 10210609 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1378431135 is about 37127.2290239926. The cubic root of 1378431135 is about 1112.9142195280.

Adding to 1378431135 its reverse (5311348731), we get a palindrome (6689779866).

The spelling of 1378431135 in words is "one billion, three hundred seventy-eight million, four hundred thirty-one thousand, one hundred thirty-five".