55029890 has 32 divisors (see below), whose sum is σ = 106056000. Its totient is φ = 20495808.

The previous prime is 55029883. The next prime is 55029893. The reversal of 55029890 is 9892055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (55029893) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8756 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (3314250).

Almost surely, 2^55029890 is an apocalyptic number.

55029890 is a deficient number, since it is larger than the sum of its proper divisors (51026110).

55029890 is a wasteful number, since it uses less digits than its factorization.

55029890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4994.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 55029890 is about 7418.2133967688. The cubic root of 55029890 is about 380.3641246602.

The spelling of 55029890 in words is "fifty-five million, twenty-nine thousand, eight hundred ninety".