1387120008 has 32 divisors (see below), whose sum is σ = 3477814560. Its totient is φ = 461038080.

The previous prime is 1387120003. The next prime is 1387120039. The reversal of 1387120008 is 8000217831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1387120003) 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, 74953 + ... + 91608.

It is an arithmetic number, because the mean of its divisors is an integer number (108681705).

Almost surely, 2^1387120008 is an apocalyptic number.

It is an amenable number.

1387120008 is an abundant number, since it is smaller than the sum of its proper divisors (2090694552).

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

1387120008 is a wasteful number, since it uses less digits than its factorization.

1387120008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166917 (or 166913 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 1387120008 is about 37244.0600364676. The cubic root of 1387120008 is about 1115.2477233841.

Adding to 1387120008 its reverse (8000217831), we get a palindrome (9387337839).

The spelling of 1387120008 in words is "one billion, three hundred eighty-seven million, one hundred twenty thousand, eight".