1386530028 has 96 divisors (see below), whose sum is σ = 3911517120. Its totient is φ = 422184960.

The previous prime is 1386530003. The next prime is 1386530039. The reversal of 1386530028 is 8200356831.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1386529974 and 1386530001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131098 + ... + 141278.

It is an arithmetic number, because the mean of its divisors is an integer number (40744970).

Almost surely, 2^1386530028 is an apocalyptic number.

1386530028 is a gapful number since it is divisible by the number (18) 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 1386530028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1955758560).

1386530028 is an abundant number, since it is smaller than the sum of its proper divisors (2524987092).

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

1386530028 is a wasteful number, since it uses less digits than its factorization.

1386530028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10304 (or 10296 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1386530028 is about 37236.1387364480. The cubic root of 1386530028 is about 1115.0895858630.

Adding to 1386530028 its reverse (8200356831), we get a palindrome (9586886859).

The spelling of 1386530028 in words is "one billion, three hundred eighty-six million, five hundred thirty thousand, twenty-eight".