53728899 has 16 divisors (see below), whose sum is σ = 82118400. Its totient is φ = 30610080.

The previous prime is 53728889. The next prime is 53728907. The reversal of 53728899 is 99882735.

It is a Cunningham number, because it is equal to 7330²-1.

It is not a de Polignac number, because 53728899 - 2⁵ = 53728867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53728879) 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, 3664 + ... + 10994.

It is an arithmetic number, because the mean of its divisors is an integer number (5132400).

Almost surely, 2^53728899 is an apocalyptic number.

53728899 is a deficient number, since it is larger than the sum of its proper divisors (28389501).

53728899 is a wasteful number, since it uses less digits than its factorization.

53728899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690.

The product of its digits is 1088640, while the sum is 51.

The square root of 53728899 is about 7329.9999317872. Note that the first 4 decimals coincide. The cubic root of 53728899 is about 377.3427241278.

The spelling of 53728899 in words is "fifty-three million, seven hundred twenty-eight thousand, eight hundred ninety-nine".