42838340 has 12 divisors (see below), whose sum is σ = 89960556. Its totient is φ = 17135328.

The previous prime is 42838337. The next prime is 42838357. The reversal of 42838340 is 4383824.

It can be written as a sum of positive squares in 2 ways, for example, as 32171584 + 10666756 = 5672^2 + 3266^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42838297 and 42838306.

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 3 ways as a sum of consecutive naturals, for example, 1070939 + ... + 1070978.

It is an arithmetic number, because the mean of its divisors is an integer number (7496713).

Almost surely, 2^42838340 is an apocalyptic number.

It is an amenable number.

42838340 is an abundant number, since it is smaller than the sum of its proper divisors (47122216).

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

42838340 is a wasteful number, since it uses less digits than its factorization.

42838340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141926 (or 2141924 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 42838340 is about 6545.1004575942. The cubic root of 42838340 is about 349.9002164528.

The spelling of 42838340 in words is "forty-two million, eight hundred thirty-eight thousand, three hundred forty".