55455940 has 24 divisors (see below), whose sum is σ = 116932032. Its totient is φ = 22092000.

The previous prime is 55455923. The next prime is 55455943. The reversal of 55455940 is 4955455.

It is a super-3 number, since 3×55455940³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 55455940.

It is not an unprimeable number, because it can be changed into a prime (55455943) 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, 504 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (4872168).

Almost surely, 2^55455940 is an apocalyptic number.

It is an amenable number.

55455940 is an abundant number, since it is smaller than the sum of its proper divisors (61476092).

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

55455940 is a wasteful number, since it uses less digits than its factorization.

55455940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11307 (or 11305 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 55455940 is about 7446.8745121695. The cubic root of 55455940 is about 381.3432150465.

The spelling of 55455940 in words is "fifty-five million, four hundred fifty-five thousand, nine hundred forty".