1438009671 has 8 divisors (see below), whose sum is σ = 2191252864. Its totient is φ = 821719800.

The previous prime is 1438009633. The next prime is 1438009673. The reversal of 1438009671 is 1769008341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1438009671 - 2²¹ = 1435912519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438009673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34238305 + ... + 34238346.

It is an arithmetic number, because the mean of its divisors is an integer number (273906608).

Almost surely, 2^1438009671 is an apocalyptic number.

1438009671 is a deficient number, since it is larger than the sum of its proper divisors (753243193).

1438009671 is an equidigital number, since it uses as much as digits as its factorization.

1438009671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68476661.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1438009671 is about 37921.0979666992. The cubic root of 1438009671 is about 1128.7227249670.

The spelling of 1438009671 in words is "one billion, four hundred thirty-eight million, nine thousand, six hundred seventy-one".