42090788 has 12 divisors (see below), whose sum is σ = 74696832. Its totient is φ = 20748840.

The previous prime is 42090787. The next prime is 42090821. The reversal of 42090788 is 88709024.

It is not an unprimeable number, because it can be changed into a prime (42090781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73820 + ... + 74387.

It is an arithmetic number, because the mean of its divisors is an integer number (6224736).

Almost surely, 2^42090788 is an apocalyptic number.

It is an amenable number.

42090788 is a deficient number, since it is larger than the sum of its proper divisors (32606044).

42090788 is a wasteful number, since it uses less digits than its factorization.

42090788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148282 (or 148280 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 42090788 is about 6487.7413635255. The cubic root of 42090788 is about 347.8529457511.

The spelling of 42090788 in words is "forty-two million, ninety thousand, seven hundred eighty-eight".