53650728 has 64 divisors (see below), whose sum is σ = 150120000. Its totient is φ = 17752896.

The previous prime is 53650631. The next prime is 53650741. The reversal of 53650728 is 82705635.

53650728 is a `hidden beast` number, since 536 + 50 + 72 + 8 = 666.

It is a super-2 number, since 2×53650728² = 5756801229859968, 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 = 53650692 and 53650701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31351 + ... + 33017.

It is an arithmetic number, because the mean of its divisors is an integer number (2345625).

Almost surely, 2^53650728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53650728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75060000).

53650728 is an abundant number, since it is smaller than the sum of its proper divisors (96469272).

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

53650728 is a wasteful number, since it uses less digits than its factorization.

53650728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 53650728 is about 7324.6657261612. The cubic root of 53650728 is about 377.1596347318.

The spelling of 53650728 in words is "fifty-three million, six hundred fifty thousand, seven hundred twenty-eight".