1387243000 has 256 divisors, whose sum is σ = 3891888000. Its totient is φ = 456192000.

The previous prime is 1387242949. The next prime is 1387243001. The reversal of 1387243000 is 3427831.

It is a self number, because there is not a number n which added to its sum of digits gives 1387243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387243001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12726946 + ... + 12727054.

Almost surely, 2^1387243000 is an apocalyptic number.

1387243000 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 1387243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945944000).

1387243000 is an abundant number, since it is smaller than the sum of its proper divisors (2504645000).

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

1387243000 is a wasteful number, since it uses less digits than its factorization.

1387243000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1387243000 is about 37245.7111624949. The cubic root of 1387243000 is about 1115.2806843616.

The spelling of 1387243000 in words is "one billion, three hundred eighty-seven million, two hundred forty-three thousand".