1438040185 has 8 divisors (see below), whose sum is σ = 1765779840. Its totient is φ = 1123677744.

The previous prime is 1438040179. The next prime is 1438040221. The reversal of 1438040185 is 5810408341.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438040185 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1438040185.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3344065 + ... + 3344494.

It is an arithmetic number, because the mean of its divisors is an integer number (220722480).

Almost surely, 2^1438040185 is an apocalyptic number.

It is an amenable number.

1438040185 is a deficient number, since it is larger than the sum of its proper divisors (327739655).

1438040185 is an equidigital number, since it uses as much as digits as its factorization.

1438040185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688607.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1438040185 is about 37921.5002999618. The cubic root of 1438040185 is about 1128.7307085947.

The spelling of 1438040185 in words is "one billion, four hundred thirty-eight million, forty thousand, one hundred eighty-five".