1438890117 has 8 divisors (see below), whose sum is σ = 2192594496. Its totient is φ = 822222912.

The previous prime is 1438890113. The next prime is 1438890119. The reversal of 1438890117 is 7110988341.

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

It is not a de Polignac number, because 1438890117 - 2² = 1438890113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438890113) 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, 34259268 + ... + 34259309.

It is an arithmetic number, because the mean of its divisors is an integer number (274074312).

Almost surely, 2^1438890117 is an apocalyptic number.

It is an amenable number.

1438890117 is a deficient number, since it is larger than the sum of its proper divisors (753704379).

1438890117 is an equidigital number, since it uses as much as digits as its factorization.

1438890117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68518587.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 1438890117 is about 37932.7051104980. The cubic root of 1438890117 is about 1128.9530378960.

The spelling of 1438890117 in words is "one billion, four hundred thirty-eight million, eight hundred ninety thousand, one hundred seventeen".