55278886 has 24 divisors (see below), whose sum is σ = 91164744. Its totient is φ = 25122240.

The previous prime is 55278833. The next prime is 55278887. The reversal of 55278886 is 68887255.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55278887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21426 + ... + 23866.

It is an arithmetic number, because the mean of its divisors is an integer number (3798531).

Almost surely, 2^55278886 is an apocalyptic number.

55278886 is a deficient number, since it is larger than the sum of its proper divisors (35885858).

55278886 is a wasteful number, since it uses less digits than its factorization.

55278886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536 (or 2523 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The square root of 55278886 is about 7434.9772023860. The cubic root of 55278886 is about 380.9369446240.

The spelling of 55278886 in words is "fifty-five million, two hundred seventy-eight thousand, eight hundred eighty-six".