1379643252 has 24 divisors (see below), whose sum is σ = 3466796256. Its totient is φ = 424505568.

The previous prime is 1379643191. The next prime is 1379643259. The reversal of 1379643252 is 2523469731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379643259) 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, 4421778 + ... + 4422089.

It is an arithmetic number, because the mean of its divisors is an integer number (144449844).

Almost surely, 2^1379643252 is an apocalyptic number.

1379643252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1379643252 is an abundant number, since it is smaller than the sum of its proper divisors (2087153004).

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

1379643252 is a wasteful number, since it uses less digits than its factorization.

1379643252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843887 (or 8843885 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The square root of 1379643252 is about 37143.5492649800. The cubic root of 1379643252 is about 1113.2403359359.

The spelling of 1379643252 in words is "one billion, three hundred seventy-nine million, six hundred forty-three thousand, two hundred fifty-two".