1378569252 has 24 divisors (see below), whose sum is σ = 3241993216. Its totient is φ = 455904288.

The previous prime is 1378569251. The next prime is 1378569289. The reversal of 1378569252 is 2529658731.

It is not an unprimeable number, because it can be changed into a prime (1378569251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450763 + ... + 453810.

Almost surely, 2^1378569252 is an apocalyptic number.

1378569252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1378569252 is an abundant number, since it is smaller than the sum of its proper divisors (1863423964).

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

1378569252 is a wasteful number, since it uses less digits than its factorization.

1378569252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904707 (or 904705 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 1378569252 is about 37129.0890273381. The cubic root of 1378569252 is about 1112.9513891371.

The spelling of 1378569252 in words is "one billion, three hundred seventy-eight million, five hundred sixty-nine thousand, two hundred fifty-two".