53390786 has 4 divisors (see below), whose sum is σ = 80086182. Its totient is φ = 26695392.

The previous prime is 53390767. The next prime is 53390801. The reversal of 53390786 is 68709335.

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., 34633225 + 18757561 = 5885^2 + 4331^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13347695 + ... + 13347698.

Almost surely, 2^53390786 is an apocalyptic number.

53390786 is a deficient number, since it is larger than the sum of its proper divisors (26695396).

53390786 is a wasteful number, since it uses less digits than its factorization.

53390786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26695395.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 53390786 is about 7306.8998898302. The cubic root of 53390786 is about 376.5495256206.

It can be divided in two parts, 533 and 90786, that added together give a palindrome (91319).

The spelling of 53390786 in words is "fifty-three million, three hundred ninety thousand, seven hundred eighty-six".