1385072052 has 96 divisors (see below), whose sum is σ = 4150659072. Its totient is φ = 349405056.

The previous prime is 1385072041. The next prime is 1385072063. The reversal of 1385072052 is 2502705831.

It is an interprime number because it is at equal distance from previous prime (1385072041) and next prime (1385072063).

It is a congruent number.

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, 2458 + ... + 52689.

It is an arithmetic number, because the mean of its divisors is an integer number (43236032).

Almost surely, 2^1385072052 is an apocalyptic number.

1385072052 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 1385072052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2075329536).

1385072052 is an abundant number, since it is smaller than the sum of its proper divisors (2765587020).

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

1385072052 is a wasteful number, since it uses less digits than its factorization.

1385072052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55197 (or 55195 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 1385072052 is about 37216.5561544859. The cubic root of 1385072052 is about 1114.6985992505.

Adding to 1385072052 its reverse (2502705831), we get a palindrome (3887777883).

The spelling of 1385072052 in words is "one billion, three hundred eighty-five million, seventy-two thousand, fifty-two".