53728015 has 16 divisors (see below), whose sum is σ = 70582176. Its totient is φ = 38937600.

The previous prime is 53728001. The next prime is 53728019. The reversal of 53728015 is 51082735.

It is not a de Polignac number, because 53728015 - 2⁵ = 53727983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53728019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15655 + ... + 18775.

It is an arithmetic number, because the mean of its divisors is an integer number (4411386).

Almost surely, 2^53728015 is an apocalyptic number.

53728015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53728015 is a deficient number, since it is larger than the sum of its proper divisors (16854161).

53728015 is a wasteful number, since it uses less digits than its factorization.

53728015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 53728015 is about 7329.9396314022. The cubic root of 53728015 is about 377.3406546469.

The spelling of 53728015 in words is "fifty-three million, seven hundred twenty-eight thousand, fifteen".