1379817378 has 24 divisors (see below), whose sum is σ = 3086044416. Its totient is φ = 445102200.

The previous prime is 1379817319. The next prime is 1379817391. The reversal of 1379817378 is 8737189731.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1235838 + ... + 1236953.

It is an arithmetic number, because the mean of its divisors is an integer number (128585184).

Almost surely, 2^1379817378 is an apocalyptic number.

1379817378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1379817378 is an abundant number, since it is smaller than the sum of its proper divisors (1706227038).

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

1379817378 is a wasteful number, since it uses less digits than its factorization.

1379817378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472830 (or 2472827 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 1379817378 is about 37145.8931511951. The cubic root of 1379817378 is about 1113.2871683162.

The spelling of 1379817378 in words is "one billion, three hundred seventy-nine million, eight hundred seventeen thousand, three hundred seventy-eight".