1381428812 has 6 divisors (see below), whose sum is σ = 2417500428. Its totient is φ = 690714404.

The previous prime is 1381428809. The next prime is 1381428817. The reversal of 1381428812 is 2188241831.

It is not an unprimeable number, because it can be changed into a prime (1381428817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172678598 + ... + 172678605.

It is an arithmetic number, because the mean of its divisors is an integer number (402916738).

Almost surely, 2^1381428812 is an apocalyptic number.

It is an amenable number.

1381428812 is a deficient number, since it is larger than the sum of its proper divisors (1036071616).

1381428812 is a wasteful number, since it uses less digits than its factorization.

1381428812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345357207 (or 345357205 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 1381428812 is about 37167.5774297976. The cubic root of 1381428812 is about 1113.7203876924.

The spelling of 1381428812 in words is "one billion, three hundred eighty-one million, four hundred twenty-eight thousand, eight hundred twelve".