53329644 has 24 divisors (see below), whose sum is σ = 138262320. Its totient is φ = 17776512.

The previous prime is 53329621. The next prime is 53329651. The reversal of 53329644 is 44692335.

53329644 is a `hidden beast` number, since 5 + 3 + 3 + 2 + 9 + 644 = 666.

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 = 53329599 and 53329608.

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 7 ways as a sum of consecutive naturals, for example, 246789 + ... + 247004.

It is an arithmetic number, because the mean of its divisors is an integer number (5760930).

Almost surely, 2^53329644 is an apocalyptic number.

53329644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

53329644 is an abundant number, since it is smaller than the sum of its proper divisors (84932676).

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

53329644 is a wasteful number, since it uses less digits than its factorization.

53329644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493806 (or 493798 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 53329644 is about 7302.7148376477. The cubic root of 53329644 is about 376.4057318633.

The spelling of 53329644 in words is "fifty-three million, three hundred twenty-nine thousand, six hundred forty-four".