55926990 has 128 divisors (see below), whose sum is σ = 172523520. Its totient is φ = 12628224.

The previous prime is 55926971. The next prime is 55927019. The reversal of 55926990 is 9962955.

55926990 is a `hidden beast` number, since 559 + 2 + 6 + 9 + 90 = 666.

55926990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 239914 + ... + 240146.

It is an arithmetic number, because the mean of its divisors is an integer number (1347840).

Almost surely, 2^55926990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55926990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86261760).

55926990 is an abundant number, since it is smaller than the sum of its proper divisors (116596530).

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

55926990 is a wasteful number, since it uses less digits than its factorization.

55926990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 55926990 is about 7478.4349967089. The cubic root of 55926990 is about 382.4198986439.

The spelling of 55926990 in words is "fifty-five million, nine hundred twenty-six thousand, nine hundred ninety".