1387940832 has 120 divisors (see below), whose sum is σ = 4169110176. Its totient is φ = 452763648.

The previous prime is 1387940821. The next prime is 1387940867. The reversal of 1387940832 is 2380497831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 116128 + ... + 127520.

Almost surely, 2^1387940832 is an apocalyptic number.

1387940832 is a gapful number since it is divisible by the number (12) 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 1387940832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084555088).

1387940832 is an abundant number, since it is smaller than the sum of its proper divisors (2781169344).

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

1387940832 is a wasteful number, since it uses less digits than its factorization.

1387940832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462 (or 11445 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1387940832 is about 37255.0779357660. The cubic root of 1387940832 is about 1115.4676614777.

The spelling of 1387940832 in words is "one billion, three hundred eighty-seven million, nine hundred forty thousand, eight hundred thirty-two".