1438309653 has 16 divisors (see below), whose sum is σ = 2108063232. Its totient is φ = 865046000.

The previous prime is 1438309627. The next prime is 1438309661. The reversal of 1438309653 is 3569038341.

It is a cyclic number.

It is not a de Polignac number, because 1438309653 - 2¹⁰ = 1438308629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438304653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162033 + ... + 170678.

It is an arithmetic number, because the mean of its divisors is an integer number (131753952).

Almost surely, 2^1438309653 is an apocalyptic number.

It is an amenable number.

1438309653 is a deficient number, since it is larger than the sum of its proper divisors (669753579).

1438309653 is a wasteful number, since it uses less digits than its factorization.

1438309653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332856.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1438309653 is about 37925.0531047749. The cubic root of 1438309653 is about 1128.8012068125.

The spelling of 1438309653 in words is "one billion, four hundred thirty-eight million, three hundred nine thousand, six hundred fifty-three".