42739280 has 20 divisors (see below), whose sum is σ = 99369012. Its totient is φ = 17095680.

The previous prime is 42739259. The next prime is 42739321. The reversal of 42739280 is 8293724.

It can be written as a sum of positive squares in 2 ways, for example, as 27962944 + 14776336 = 5288^2 + 3844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 42739280.

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, 267041 + ... + 267200.

Almost surely, 2^42739280 is an apocalyptic number.

42739280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42739280 is an abundant number, since it is smaller than the sum of its proper divisors (56629732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42739280 is a wasteful number, since it uses less digits than its factorization.

42739280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534254 (or 534248 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 42739280 is about 6537.5285850235. The cubic root of 42739280 is about 349.6303035136.

The spelling of 42739280 in words is "forty-two million, seven hundred thirty-nine thousand, two hundred eighty".