1387686480 has 240 divisors, whose sum is σ = 4625751552. Its totient is φ = 343526400.

The previous prime is 1387686467. The next prime is 1387686481. The reversal of 1387686480 is 846867831.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387686481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19544845 + ... + 19544915.

Almost surely, 2^1387686480 is an apocalyptic number.

1387686480 is a gapful number since it is divisible by the number (10) 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 1387686480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312875776).

1387686480 is an abundant number, since it is smaller than the sum of its proper divisors (3238065072).

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

1387686480 is a wasteful number, since it uses less digits than its factorization.

1387686480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 1387686480 is about 37251.6641239019. The cubic root of 1387686480 is about 1115.3995176594.

The spelling of 1387686480 in words is "one billion, three hundred eighty-seven million, six hundred eighty-six thousand, four hundred eighty".