42755990 has 16 divisors (see below), whose sum is σ = 77187600. Its totient is φ = 17052000.

The previous prime is 42755981. The next prime is 42756031. The reversal of 42755990 is 9955724.

42755990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2636 + ... + 9615.

It is an arithmetic number, because the mean of its divisors is an integer number (4824225).

Almost surely, 2^42755990 is an apocalyptic number.

42755990 is a deficient number, since it is larger than the sum of its proper divisors (34431610).

42755990 is a wasteful number, since it uses less digits than its factorization.

42755990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12607.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 42755990 is about 6538.8064660150. The cubic root of 42755990 is about 349.6758631732.

The spelling of 42755990 in words is "forty-two million, seven hundred fifty-five thousand, nine hundred ninety".