42739828 has 12 divisors (see below), whose sum is σ = 75009060. Its totient is φ = 21308672.

The previous prime is 42739817. The next prime is 42739831. The reversal of 42739828 is 82893724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26915344 + 15824484 = 5188^2 + 3978^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13723 + ... + 16546.

It is an arithmetic number, because the mean of its divisors is an integer number (6250755).

Almost surely, 2^42739828 is an apocalyptic number.

It is an amenable number.

42739828 is a deficient number, since it is larger than the sum of its proper divisors (32269232).

42739828 is a wasteful number, since it uses less digits than its factorization.

42739828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30626 (or 30624 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 42739828 is about 6537.5704967518. The cubic root of 42739828 is about 349.6317978189.

The spelling of 42739828 in words is "forty-two million, seven hundred thirty-nine thousand, eight hundred twenty-eight".