1438408517 has 12 divisors (see below), whose sum is σ = 1780077600. Its totient is φ = 1138080528.

The previous prime is 1438408513. The next prime is 1438408519. The reversal of 1438408517 is 7158048341.

It is not a de Polignac number, because 1438408517 - 2² = 1438408513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438408513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606767 + ... + 609132.

It is an arithmetic number, because the mean of its divisors is an integer number (148339800).

Almost surely, 2^1438408517 is an apocalyptic number.

It is an amenable number.

1438408517 is a deficient number, since it is larger than the sum of its proper divisors (341669083).

1438408517 is a wasteful number, since it uses less digits than its factorization.

1438408517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215932 (or 1215919 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 1438408517 is about 37926.3564951868. The cubic root of 1438408517 is about 1128.8270694041.

The spelling of 1438408517 in words is "one billion, four hundred thirty-eight million, four hundred eight thousand, five hundred seventeen".