838653394 has 4 divisors (see below), whose sum is σ = 1257980094. Its totient is φ = 419326696.

The previous prime is 838653391. The next prime is 838653421. The reversal of 838653394 is 493356838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 717543369 + 121110025 = 26787^2 + 11005^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (838653391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209663347 + ... + 209663350.

Almost surely, 2^838653394 is an apocalyptic number.

838653394 is a deficient number, since it is larger than the sum of its proper divisors (419326700).

838653394 is a wasteful number, since it uses less digits than its factorization.

838653394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419326699.

The product of its digits is 1866240, while the sum is 49.

The square root of 838653394 is about 28959.5130138613. The cubic root of 838653394 is about 943.0343299668.

The spelling of 838653394 in words is "eight hundred thirty-eight million, six hundred fifty-three thousand, three hundred ninety-four".