1378531284 has 48 divisors (see below), whose sum is σ = 3495824640. Its totient is φ = 420266880.

The previous prime is 1378531267. The next prime is 1378531303. The reversal of 1378531284 is 4821358731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23532 + ... + 57539.

It is an arithmetic number, because the mean of its divisors is an integer number (72829680).

Almost surely, 2^1378531284 is an apocalyptic number.

It is an amenable number.

1378531284 is an abundant number, since it is smaller than the sum of its proper divisors (2117293356).

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

1378531284 is a wasteful number, since it uses less digits than its factorization.

1378531284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81200 (or 81198 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 1378531284 is about 37128.5777265976. The cubic root of 1378531284 is about 1112.9411715568.

The spelling of 1378531284 in words is "one billion, three hundred seventy-eight million, five hundred thirty-one thousand, two hundred eighty-four".