54128865 has 32 divisors (see below), whose sum is σ = 100187136. Its totient is φ = 24442560.

The previous prime is 54128863. The next prime is 54128911. The reversal of 54128865 is 56882145.

It is not a de Polignac number, because 54128865 - 2¹ = 54128863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54128863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5610 + ... + 11820.

It is an arithmetic number, because the mean of its divisors is an integer number (3130848).

Almost surely, 2^54128865 is an apocalyptic number.

It is an amenable number.

54128865 is a deficient number, since it is larger than the sum of its proper divisors (46058271).

54128865 is a wasteful number, since it uses less digits than its factorization.

54128865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6309.

The product of its digits is 76800, while the sum is 39.

The square root of 54128865 is about 7357.2321561848. The cubic root of 54128865 is about 378.2767422757.

The spelling of 54128865 in words is "fifty-four million, one hundred twenty-eight thousand, eight hundred sixty-five".