55838809 has 8 divisors (see below), whose sum is σ = 61759880. Its totient is φ = 50150016.

The previous prime is 55838807. The next prime is 55838819. The reversal of 55838809 is 90883855.

It can be written as a sum of positive squares in 4 ways, for example, as 11323225 + 44515584 = 3365^2 + 6672^2 .

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 55838809 - 2¹ = 55838807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55838801) 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, 57564 + ... + 58525.

It is an arithmetic number, because the mean of its divisors is an integer number (7719985).

Almost surely, 2^55838809 is an apocalyptic number.

It is an amenable number.

55838809 is a deficient number, since it is larger than the sum of its proper divisors (5921071).

55838809 is a wasteful number, since it uses less digits than its factorization.

55838809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116139.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 55838809 is about 7472.5369855224. The cubic root of 55838809 is about 382.2188036803.

The spelling of 55838809 in words is "fifty-five million, eight hundred thirty-eight thousand, eight hundred nine".