1387830 has 16 divisors (see below), whose sum is σ = 3330864. Its totient is φ = 370080.

The previous prime is 1387823. The next prime is 1387847. The reversal of 1387830 is 387831.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 46261 = 1387830 / (1 + 3 + 8 + 7 + 8 + 3 + 0).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 23101 + ... + 23160.

It is an arithmetic number, because the mean of its divisors is an integer number (208179).

2^1387830 is an apocalyptic number.

1387830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387830 is an abundant number, since it is smaller than the sum of its proper divisors (1943034).

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

1387830 is a wasteful number, since it uses less digits than its factorization.

1387830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46271.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1387830 is about 1178.0619678098. The cubic root of 1387830 is about 111.5437969337.

Subtracting from 1387830 its reverse (387831), we obtain a palindrome (999999).

The spelling of 1387830 in words is "one million, three hundred eighty-seven thousand, eight hundred thirty".