1438928849 has 4 divisors (see below), whose sum is σ = 1452899136. Its totient is φ = 1424958564.

The previous prime is 1438928839. The next prime is 1438928851. The reversal of 1438928849 is 9488298341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1438928849 - 2⁴ = 1438928833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1438928794 and 1438928803.

It is not an unprimeable number, because it can be changed into a prime (1438928809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6984989 + ... + 6985194.

It is an arithmetic number, because the mean of its divisors is an integer number (363224784).

Almost surely, 2^1438928849 is an apocalyptic number.

It is an amenable number.

1438928849 is a deficient number, since it is larger than the sum of its proper divisors (13970287).

1438928849 is a wasteful number, since it uses less digits than its factorization.

1438928849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970286.

The product of its digits is 3981312, while the sum is 56.

The square root of 1438928849 is about 37933.2156427583. The cubic root of 1438928849 is about 1128.9631675128.

The spelling of 1438928849 in words is "one billion, four hundred thirty-eight million, nine hundred twenty-eight thousand, eight hundred forty-nine".