1395800028 has 144 divisors (see below), whose sum is σ = 4297273344. Its totient is φ = 372902400.

The previous prime is 1395799949. The next prime is 1395800051. The reversal of 1395800028 is 8200085931.

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 = 1395799965 and 1395800001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 714453 + ... + 716403.

It is an arithmetic number, because the mean of its divisors is an integer number (29842176).

Almost surely, 2^1395800028 is an apocalyptic number.

1395800028 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 1395800028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2148636672).

1395800028 is an abundant number, since it is smaller than the sum of its proper divisors (2901473316).

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

1395800028 is a wasteful number, since it uses less digits than its factorization.

1395800028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1395800028 is about 37360.4072247613. The cubic root of 1395800028 is about 1117.5691400550.

Adding to 1395800028 its reverse (8200085931), we get a palindrome (9595885959).

The spelling of 1395800028 in words is "one billion, three hundred ninety-five million, eight hundred thousand, twenty-eight".