1387284378 has 16 divisors (see below), whose sum is σ = 2775025440. Its totient is φ = 462352016.

The previous prime is 1387284377. The next prime is 1387284403. The reversal of 1387284378 is 8734827831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387284378.

It is not an unprimeable number, because it can be changed into a prime (1387284377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30301 + ... + 60767.

It is an arithmetic number, because the mean of its divisors is an integer number (173439090).

Almost surely, 2^1387284378 is an apocalyptic number.

1387284378 is an abundant number, since it is smaller than the sum of its proper divisors (1387741062).

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

1387284378 is a wasteful number, since it uses less digits than its factorization.

1387284378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38061.

The product of its digits is 1806336, while the sum is 51.

The square root of 1387284378 is about 37246.2666317042. The cubic root of 1387284378 is about 1115.2917729321.

The spelling of 1387284378 in words is "one billion, three hundred eighty-seven million, two hundred eighty-four thousand, three hundred seventy-eight".