53275644 has 30 divisors (see below), whose sum is σ = 139273904. Its totient is φ = 17758440.

The previous prime is 53275589. The next prime is 53275679. The reversal of 53275644 is 44657235.

53275644 is a `hidden beast` number, since 5 + 3 + 2 + 7 + 5 + 644 = 666.

It is a super-2 number, since 2×53275644² = 5676588487229472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53275599 and 53275608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 81892 + ... + 82539.

Almost surely, 2^53275644 is an apocalyptic number.

53275644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

53275644 is an abundant number, since it is smaller than the sum of its proper divisors (85998260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53275644 is a wasteful number, since it uses less digits than its factorization.

53275644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164447 (or 164436 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 53275644 is about 7299.0166460969. The cubic root of 53275644 is about 376.2786432354.

It can be divided in two parts, 532 and 75644, that added together give a square (76176 = 276²).

The spelling of 53275644 in words is "fifty-three million, two hundred seventy-five thousand, six hundred forty-four".