42804538 has 24 divisors (see below), whose sum is σ = 79086132. Its totient is φ = 17265024.

The previous prime is 42804529. The next prime is 42804547. The reversal of 42804538 is 83540824.

It is an interprime number because it is at equal distance from previous prime (42804529) and next prime (42804547).

It can be written as a sum of positive squares in 2 ways, for example, as 37173409 + 5631129 = 6097^2 + 2373^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11181 + ... + 14512.

Almost surely, 2^42804538 is an apocalyptic number.

42804538 is a deficient number, since it is larger than the sum of its proper divisors (36281594).

42804538 is a wasteful number, since it uses less digits than its factorization.

42804538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25726 (or 25719 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 42804538 is about 6542.5177110956. The cubic root of 42804538 is about 349.8081615373.

The spelling of 42804538 in words is "forty-two million, eight hundred four thousand, five hundred thirty-eight".