55840628 has 12 divisors (see below), whose sum is σ = 98005152. Its totient is φ = 27839160.

The previous prime is 55840627. The next prime is 55840633. The reversal of 55840628 is 82604855.

55840628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55840591 and 55840600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55840621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18728 + ... + 21503.

It is an arithmetic number, because the mean of its divisors is an integer number (8167096).

Almost surely, 2^55840628 is an apocalyptic number.

It is an amenable number.

55840628 is a deficient number, since it is larger than the sum of its proper divisors (42164524).

55840628 is a wasteful number, since it uses less digits than its factorization.

55840628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40582 (or 40580 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 55840628 is about 7472.6586968762. The cubic root of 55840628 is about 382.2229540103. Note that the first 3 decimals are identical.

The spelling of 55840628 in words is "fifty-five million, eight hundred forty thousand, six hundred twenty-eight".