55390060 has 48 divisors (see below), whose sum is σ = 128540160. Its totient is φ = 19880640.

The previous prime is 55390051. The next prime is 55390061. The reversal of 55390060 is 6009355.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55390061) 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, 15787 + ... + 18973.

It is an arithmetic number, because the mean of its divisors is an integer number (2677920).

Almost surely, 2^55390060 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55390060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64270080).

55390060 is an abundant number, since it is smaller than the sum of its proper divisors (73150100).

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

55390060 is a wasteful number, since it uses less digits than its factorization.

55390060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286 (or 3284 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 55390060 is about 7442.4498654677. The cubic root of 55390060 is about 381.1921470936.

The spelling of 55390060 in words is "fifty-five million, three hundred ninety thousand, sixty".