55928905 has 4 divisors (see below), whose sum is σ = 67114692. Its totient is φ = 44743120.

The previous prime is 55928903. The next prime is 55928909. The reversal of 55928905 is 50982955.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40998409 + 14930496 = 6403^2 + 3864^2 .

It is not a de Polignac number, because 55928905 - 2¹ = 55928903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55928903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5592886 + ... + 5592895.

It is an arithmetic number, because the mean of its divisors is an integer number (16778673).

Almost surely, 2^55928905 is an apocalyptic number.

It is an amenable number.

55928905 is a deficient number, since it is larger than the sum of its proper divisors (11185787).

55928905 is a wasteful number, since it uses less digits than its factorization.

55928905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11185786.

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 55928905 is about 7478.5630304224. The cubic root of 55928905 is about 382.4242634163.

The spelling of 55928905 in words is "fifty-five million, nine hundred twenty-eight thousand, nine hundred five".