55887905 has 8 divisors (see below), whose sum is σ = 67125672. Its totient is φ = 44670208.

The previous prime is 55887899. The next prime is 55887929. The reversal of 55887905 is 50978855.

It can be written as a sum of positive squares in 4 ways, for example, as 18421264 + 37466641 = 4292^2 + 6121^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55887905 - 2⁴ = 55887889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55887905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (8390709).

Almost surely, 2^55887905 is an apocalyptic number.

It is an amenable number.

55887905 is a deficient number, since it is larger than the sum of its proper divisors (11237767).

55887905 is a wasteful number, since it uses less digits than its factorization.

55887905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035.

The product of its (nonzero) digits is 504000, while the sum is 47.

The square root of 55887905 is about 7475.8213595564. The cubic root of 55887905 is about 382.3307922035.

The spelling of 55887905 in words is "fifty-five million, eight hundred eighty-seven thousand, nine hundred five".