55858220 has 24 divisors (see below), whose sum is σ = 127966608. Its totient is φ = 20312000.

The previous prime is 55858219. The next prime is 55858223. The reversal of 55858220 is 2285855.

It is not an unprimeable number, because it can be changed into a prime (55858223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126731 + ... + 127170.

It is an arithmetic number, because the mean of its divisors is an integer number (5331942).

Almost surely, 2^55858220 is an apocalyptic number.

It is an amenable number.

55858220 is an abundant number, since it is smaller than the sum of its proper divisors (72108388).

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

55858220 is a wasteful number, since it uses less digits than its factorization.

55858220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253921 (or 253919 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 55858220 is about 7473.8356952772. The cubic root of 55858220 is about 382.2630882307.

The spelling of 55858220 in words is "fifty-five million, eight hundred fifty-eight thousand, two hundred twenty".