1387135854 has 96 divisors (see below), whose sum is σ = 3377853024. Its totient is φ = 424103040.

The previous prime is 1387135847. The next prime is 1387135861. The reversal of 1387135854 is 4585317831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1387135847) and next prime (1387135861).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1142952 + ... + 1144164.

It is an arithmetic number, because the mean of its divisors is an integer number (35185969).

Almost surely, 2^1387135854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387135854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688926512).

1387135854 is an abundant number, since it is smaller than the sum of its proper divisors (1990717170).

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

1387135854 is a wasteful number, since it uses less digits than its factorization.

1387135854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1412 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 1387135854 is about 37244.2727677693. The cubic root of 1387135854 is about 1115.2519701083.

The spelling of 1387135854 in words is "one billion, three hundred eighty-seven million, one hundred thirty-five thousand, eight hundred fifty-four".