1381908057 has 32 divisors (see below), whose sum is σ = 2033126400. Its totient is φ = 831010752.

The previous prime is 1381908043. The next prime is 1381908083. The reversal of 1381908057 is 7508091831.

It is not a de Polignac number, because 1381908057 - 2¹² = 1381903961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381908007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297918 + ... + 302520.

It is an arithmetic number, because the mean of its divisors is an integer number (63535200).

Almost surely, 2^1381908057 is an apocalyptic number.

It is an amenable number.

1381908057 is a deficient number, since it is larger than the sum of its proper divisors (651218343).

1381908057 is a wasteful number, since it uses less digits than its factorization.

1381908057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1381908057 is about 37174.0239549070. The cubic root of 1381908057 is about 1113.8491633514.

Adding to 1381908057 its reverse (7508091831), we get a palindrome (8889999888).

The spelling of 1381908057 in words is "one billion, three hundred eighty-one million, nine hundred eight thousand, fifty-seven".