1538438007 has 8 divisors (see below), whose sum is σ = 2140435584. Its totient is φ = 981032888.

The previous prime is 1538437903. The next prime is 1538438009. The reversal of 1538438007 is 7008348351.

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

It is a cyclic number.

It is not a de Polignac number, because 1538438007 - 2¹⁶ = 1538372471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538438009) 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, 11148033 + ... + 11148170.

It is an arithmetic number, because the mean of its divisors is an integer number (267554448).

Almost surely, 2^1538438007 is an apocalyptic number.

1538438007 is a deficient number, since it is larger than the sum of its proper divisors (601997577).

1538438007 is a wasteful number, since it uses less digits than its factorization.

1538438007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22296229.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1538438007 is about 39222.9270580358. The cubic root of 1538438007 is about 1154.4097874652.

The spelling of 1538438007 in words is "one billion, five hundred thirty-eight million, four hundred thirty-eight thousand, seven".