55605630 has 32 divisors (see below), whose sum is σ = 137760768. Its totient is φ = 14349600.

The previous prime is 55605611. The next prime is 55605631. The reversal of 55605630 is 3650655.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55605631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28966 + ... + 30825.

It is an arithmetic number, because the mean of its divisors is an integer number (4305024).

Almost surely, 2^55605630 is an apocalyptic number.

55605630 is an abundant number, since it is smaller than the sum of its proper divisors (82155138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55605630 is a wasteful number, since it uses less digits than its factorization.

55605630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59832.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 55605630 is about 7456.9182642698. The cubic root of 55605630 is about 381.6860216174.

The spelling of 55605630 in words is "fifty-five million, six hundred five thousand, six hundred thirty".