53638394 has 4 divisors (see below), whose sum is σ = 80457594. Its totient is φ = 26819196.

The previous prime is 53638309. The next prime is 53638397. The reversal of 53638394 is 49383635.

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., 41770369 + 11868025 = 6463^2 + 3445^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53638397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13409597 + ... + 13409600.

Almost surely, 2^53638394 is an apocalyptic number.

53638394 is a deficient number, since it is larger than the sum of its proper divisors (26819200).

53638394 is a wasteful number, since it uses less digits than its factorization.

53638394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26819199.

The product of its digits is 233280, while the sum is 41.

The square root of 53638394 is about 7323.8237280808. The cubic root of 53638394 is about 377.1307302252.

The spelling of 53638394 in words is "fifty-three million, six hundred thirty-eight thousand, three hundred ninety-four".