1378868508 has 96 divisors (see below), whose sum is σ = 3644945920. Its totient is φ = 456330672.

The previous prime is 1378868503. The next prime is 1378868567. The reversal of 1378868508 is 8058688731.

It is a happy number.

1378868508 is a `hidden beast` number, since 1 + 3 + 78 + 8 + 68 + 508 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378868503) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1425441 + ... + 1426407.

Almost surely, 2^1378868508 is an apocalyptic number.

1378868508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378868508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822472960).

1378868508 is an abundant number, since it is smaller than the sum of its proper divisors (2266077412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378868508 is an equidigital number, since it uses as much as digits as its factorization.

1378868508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The square root of 1378868508 is about 37133.1187486319. The cubic root of 1378868508 is about 1113.0319154469.

The spelling of 1378868508 in words is "one billion, three hundred seventy-eight million, eight hundred sixty-eight thousand, five hundred eight".