1438782618 has 64 divisors (see below), whose sum is σ = 3695634432. Its totient is φ = 362957760.

The previous prime is 1438782559. The next prime is 1438782643. The reversal of 1438782618 is 8162878341.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44728 + ... + 69843.

It is an arithmetic number, because the mean of its divisors is an integer number (57744288).

Almost surely, 2^1438782618 is an apocalyptic number.

1438782618 is an abundant number, since it is smaller than the sum of its proper divisors (2256851814).

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

1438782618 is a wasteful number, since it uses less digits than its factorization.

1438782618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114619.

The product of its digits is 516096, while the sum is 48.

The square root of 1438782618 is about 37931.2881141677. The cubic root of 1438782618 is about 1128.9249226277.

The spelling of 1438782618 in words is "one billion, four hundred thirty-eight million, seven hundred eighty-two thousand, six hundred eighteen".