1387059870 has 64 divisors (see below), whose sum is σ = 3821253120. Its totient is φ = 315646848.

The previous prime is 1387059841. The next prime is 1387059881. The reversal of 1387059870 is 789507831.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33669 + ... + 62511.

It is an arithmetic number, because the mean of its divisors is an integer number (59707080).

Almost surely, 2^1387059870 is an apocalyptic number.

1387059870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387059870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910626560).

1387059870 is an abundant number, since it is smaller than the sum of its proper divisors (2434193250).

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

1387059870 is a wasteful number, since it uses less digits than its factorization.

1387059870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29089.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 1387059870 is about 37243.2526774985. The cubic root of 1387059870 is about 1115.2316061204.

The spelling of 1387059870 in words is "one billion, three hundred eighty-seven million, fifty-nine thousand, eight hundred seventy".