1438480649 has 4 divisors (see below), whose sum is σ = 1488083460. Its totient is φ = 1388877840.

The previous prime is 1438480639. The next prime is 1438480663. The reversal of 1438480649 is 9460848341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9460848341 = 7 ⋅1351549763.

It can be written as a sum of positive squares in 2 ways, for example, as 1190733049 + 247747600 = 34507^2 + 15740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438480649 - 2¹⁶ = 1438415113 is a prime.

It is a super-2 number, since 2×1438480649² = 4138453155094922402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438480639) 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 3 ways as a sum of consecutive naturals, for example, 24801362 + ... + 24801419.

It is an arithmetic number, because the mean of its divisors is an integer number (372020865).

Almost surely, 2^1438480649 is an apocalyptic number.

It is an amenable number.

1438480649 is a deficient number, since it is larger than the sum of its proper divisors (49602811).

1438480649 is an equidigital number, since it uses as much as digits as its factorization.

1438480649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49602810.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 1438480649 is about 37927.3074314537. The cubic root of 1438480649 is about 1128.8459382192.

The spelling of 1438480649 in words is "one billion, four hundred thirty-eight million, four hundred eighty thousand, six hundred forty-nine".