55829620 has 72 divisors (see below), whose sum is σ = 148811040. Its totient is φ = 17398080.

The previous prime is 55829573. The next prime is 55829623. The reversal of 55829620 is 2692855.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55829620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55829623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8191 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (2066820).

Almost surely, 2^55829620 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 55829620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74405520).

55829620 is an abundant number, since it is smaller than the sum of its proper divisors (92981420).

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

55829620 is a wasteful number, since it uses less digits than its factorization.

55829620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213 (or 5204 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 55829620 is about 7471.9221088017. The cubic root of 55829620 is about 382.1978361768.

The spelling of 55829620 in words is "fifty-five million, eight hundred twenty-nine thousand, six hundred twenty".