1387489608 has 64 divisors (see below), whose sum is σ = 3857256000. Its totient is φ = 462122496.

The previous prime is 1387489577. The next prime is 1387489613. The reversal of 1387489608 is 8069847831.

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

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, 436248 + ... + 439416.

It is an arithmetic number, because the mean of its divisors is an integer number (60269625).

Almost surely, 2^1387489608 is an apocalyptic number.

1387489608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1387489608 is an abundant number, since it is smaller than the sum of its proper divisors (2469766392).

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

1387489608 is a wasteful number, since it uses less digits than its factorization.

1387489608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211 (or 5201 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 1387489608 is about 37249.0215710426. The cubic root of 1387489608 is about 1115.3467676753.

The spelling of 1387489608 in words is "one billion, three hundred eighty-seven million, four hundred eighty-nine thousand, six hundred eight".