1396618938 has 48 divisors (see below), whose sum is σ = 3555036576. Its totient is φ = 390661920.

The previous prime is 1396618933. The next prime is 1396618967. The reversal of 1396618938 is 8398166931.

1396618938 is a `hidden beast` number, since 13 + 9 + 6 + 618 + 9 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1396618933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268720 + ... + 273867.

It is an arithmetic number, because the mean of its divisors is an integer number (74063262).

Almost surely, 2^1396618938 is an apocalyptic number.

1396618938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1396618938 is an abundant number, since it is smaller than the sum of its proper divisors (2158417638).

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

1396618938 is a wasteful number, since it uses less digits than its factorization.

1396618938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542619 (or 542616 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1396618938 is about 37371.3652145597. The cubic root of 1396618938 is about 1117.7876550298.

The spelling of 1396618938 in words is "one billion, three hundred ninety-six million, six hundred eighteen thousand, nine hundred thirty-eight".