1396415138 has 4 divisors (see below), whose sum is σ = 2094622710. Its totient is φ = 698207568.

The previous prime is 1396415129. The next prime is 1396415143. The reversal of 1396415138 is 8315146931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1294344529 + 102070609 = 35977^2 + 10103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1396415095 and 1396415104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349103783 + ... + 349103786.

Almost surely, 2^1396415138 is an apocalyptic number.

1396415138 is a deficient number, since it is larger than the sum of its proper divisors (698207572).

1396415138 is an equidigital number, since it uses as much as digits as its factorization.

1396415138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698207571.

The product of its digits is 77760, while the sum is 41.

The square root of 1396415138 is about 37368.6384285004. The cubic root of 1396415138 is about 1117.7332817622.

The spelling of 1396415138 in words is "one billion, three hundred ninety-six million, four hundred fifteen thousand, one hundred thirty-eight".