55359880 has 32 divisors (see below), whose sum is σ = 125043840. Its totient is φ = 22057920.

The previous prime is 55359847. The next prime is 55359883. The reversal of 55359880 is 8895355.

It is a happy number.

It is a super-2 number, since 2×55359880² = 6129432627228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55359883) 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, 8287 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (3907620).

Almost surely, 2^55359880 is an apocalyptic number.

It is an amenable number.

55359880 is an abundant number, since it is smaller than the sum of its proper divisors (69683960).

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

55359880 is a wasteful number, since it uses less digits than its factorization.

55359880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 55359880 is about 7440.4220310410. The cubic root of 55359880 is about 381.1229020036.

The spelling of 55359880 in words is "fifty-five million, three hundred fifty-nine thousand, eight hundred eighty".