55903978 has 16 divisors (see below), whose sum is σ = 90429696. Its totient is φ = 25766640.

The previous prime is 55903957. The next prime is 55903997. The reversal of 55903978 is 87930955.

55903978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 36243 + ... + 37753.

It is an arithmetic number, because the mean of its divisors is an integer number (5651856).

Almost surely, 2^55903978 is an apocalyptic number.

55903978 is a deficient number, since it is larger than the sum of its proper divisors (34525718).

55903978 is a wasteful number, since it uses less digits than its factorization.

55903978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 55903978 is about 7476.8962812119. The cubic root of 55903978 is about 382.3674406447.

The spelling of 55903978 in words is "fifty-five million, nine hundred three thousand, nine hundred seventy-eight".