55842290 has 16 divisors (see below), whose sum is σ = 114875712. Its totient is φ = 19145904.

The previous prime is 55842271. The next prime is 55842307. The reversal of 55842290 is 9224855.

It is a happy number.

55842290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55842290² = 6236722704888200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 55842290.

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 7 ways as a sum of consecutive naturals, for example, 398804 + ... + 398943.

It is an arithmetic number, because the mean of its divisors is an integer number (7179732).

Almost surely, 2^55842290 is an apocalyptic number.

55842290 is an abundant number, since it is smaller than the sum of its proper divisors (59033422).

55842290 is a wasteful number, since it uses less digits than its factorization.

55842290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797761.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 55842290 is about 7472.7699014489. The cubic root of 55842290 is about 382.2267460417.

The spelling of 55842290 in words is "fifty-five million, eight hundred forty-two thousand, two hundred ninety".