55630368 has 144 divisors (see below), whose sum is σ = 170160480. Its totient is φ = 17677440.

The previous prime is 55630349. The next prime is 55630387. The reversal of 55630368 is 86303655.

It is an interprime number because it is at equal distance from previous prime (55630349) and next prime (55630387).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830271 + ... + 830337.

It is an arithmetic number, because the mean of its divisors is an integer number (1181670).

Almost surely, 2^55630368 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 55630368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85080240).

55630368 is an abundant number, since it is smaller than the sum of its proper divisors (114530112).

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

55630368 is a wasteful number, since it uses less digits than its factorization.

55630368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 55630368 is about 7458.5768079440. The cubic root of 55630368 is about 381.7426151010.

The spelling of 55630368 in words is "fifty-five million, six hundred thirty thousand, three hundred sixty-eight".