1387930 has 8 divisors (see below), whose sum is σ = 2498292. Its totient is φ = 555168.

The previous prime is 1387927. The next prime is 1387943. The reversal of 1387930 is 397831.

It can be written as a sum of positive squares in 2 ways, for example, as 1385329 + 2601 = 1177^2 + 51^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1387892 and 1387901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69387 + ... + 69406.

2^1387930 is an apocalyptic number.

1387930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387930 is a deficient number, since it is larger than the sum of its proper divisors (1110362).

1387930 is a wasteful number, since it uses less digits than its factorization.

1387930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138800.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1387930 is about 1178.1044096344. The cubic root of 1387930 is about 111.5464759630.

Subtracting from 1387930 its reverse (397831), we obtain a palindrome (990099).

The spelling of 1387930 in words is "one million, three hundred eighty-seven thousand, nine hundred thirty".