42742388 has 24 divisors (see below), whose sum is σ = 81302760. Its totient is φ = 19543680.

The previous prime is 42742351. The next prime is 42742409. The reversal of 42742388 is 88324724.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 258064 + 42484324 = 508^2 + 6518^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898 + ... + 9438.

It is an arithmetic number, because the mean of its divisors is an integer number (3387615).

Almost surely, 2^42742388 is an apocalyptic number.

It is an amenable number.

42742388 is a deficient number, since it is larger than the sum of its proper divisors (38560372).

42742388 is a wasteful number, since it uses less digits than its factorization.

42742388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667 (or 7665 counting only the distinct ones).

The product of its digits is 86016, while the sum is 38.

The square root of 42742388 is about 6537.7662852078. The cubic root of 42742388 is about 349.6387783456.

The spelling of 42742388 in words is "forty-two million, seven hundred forty-two thousand, three hundred eighty-eight".