53728881 has 8 divisors (see below), whose sum is σ = 72852960. Its totient is φ = 35212032.

The previous prime is 53728879. The next prime is 53728889. The reversal of 53728881 is 18882735.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53728881 - 2¹ = 53728879 is a prime.

It is a super-2 number, since 2×53728881² = 5773585307024322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53728889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151600 + ... + 151953.

It is an arithmetic number, because the mean of its divisors is an integer number (9106620).

Almost surely, 2^53728881 is an apocalyptic number.

It is an amenable number.

53728881 is a deficient number, since it is larger than the sum of its proper divisors (19124079).

53728881 is a wasteful number, since it uses less digits than its factorization.

53728881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303615.

The product of its digits is 107520, while the sum is 42.

The square root of 53728881 is about 7329.9987039562. The cubic root of 53728881 is about 377.3426819893.

The spelling of 53728881 in words is "fifty-three million, seven hundred twenty-eight thousand, eight hundred eighty-one".