1387909215000 has 2560 divisors, whose sum is σ = 6391554048000. Its totient is φ = 270604800000.

The previous prime is 1387909214987. The next prime is 1387909215001. The reversal of 1387909215000 is 5129097831.

1387909215000 is a `hidden beast` number, since 1 + 38 + 7 + 90 + 9 + 21 + 500 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387909215001) by changing a digit.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 19012454964 + ... + 19012455036.

It is an arithmetic number, because the mean of its divisors is an integer number (2496700800).

Almost surely, 2^{1387909215000} is an apocalyptic number.

1387909215000 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 1387909215000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3195777024000).

1387909215000 is an abundant number, since it is smaller than the sum of its proper divisors (5003644833000).

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

1387909215000 is a wasteful number, since it uses less digits than its factorization.

1387909215000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 1387909215000 in words is "one trillion, three hundred eighty-seven billion, nine hundred nine million, two hundred fifteen thousand".