1380397952 has 32 divisors (see below), whose sum is σ = 2766521520. Its totient is φ = 686055424.

The previous prime is 1380397951. The next prime is 1380397957. The reversal of 1380397952 is 2597930831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 1380397897 and 1380397906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380397951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10913 + ... + 53664.

Almost surely, 2^1380397952 is an apocalyptic number.

It is an amenable number.

1380397952 is an abundant number, since it is smaller than the sum of its proper divisors (1386123568).

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

1380397952 is an equidigital number, since it uses as much as digits as its factorization.

1380397952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64758 (or 64746 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1380397952 is about 37153.7071097892. The cubic root of 1380397952 is about 1113.4432892066.

The spelling of 1380397952 in words is "one billion, three hundred eighty million, three hundred ninety-seven thousand, nine hundred fifty-two".