55789830 has 64 divisors (see below), whose sum is σ = 150036480. Its totient is φ = 14751072.

The previous prime is 55789829. The next prime is 55789859. The reversal of 55789830 is 3898755.

55789830 is a `hidden beast` number, since 557 + 8 + 98 + 3 + 0 = 666.

It is a super-2 number, since 2×55789830² = 6225010262857800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 33477 + ... + 35103.

It is an arithmetic number, because the mean of its divisors is an integer number (2344320).

Almost surely, 2^55789830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55789830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75018240).

55789830 is an abundant number, since it is smaller than the sum of its proper divisors (94246650).

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

55789830 is a wasteful number, since it uses less digits than its factorization.

55789830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 55789830 is about 7469.2589993921. The cubic root of 55789830 is about 382.1070166072.

The spelling of 55789830 in words is "fifty-five million, seven hundred eighty-nine thousand, eight hundred thirty".