42890530 has 8 divisors (see below), whose sum is σ = 77202972. Its totient is φ = 17156208.

The previous prime is 42890521. The next prime is 42890531. The reversal of 42890530 is 3509824.

It can be written as a sum of positive squares in 2 ways, for example, as 39803481 + 3087049 = 6309^2 + 1757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42890492 and 42890501.

It is not an unprimeable number, because it can be changed into a prime (42890531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144517 + ... + 2144536.

Almost surely, 2^42890530 is an apocalyptic number.

42890530 is a deficient number, since it is larger than the sum of its proper divisors (34312442).

42890530 is a wasteful number, since it uses less digits than its factorization.

42890530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289060.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42890530 is about 6549.0861957986. The cubic root of 42890530 is about 350.0422534022.

The spelling of 42890530 in words is "forty-two million, eight hundred ninety thousand, five hundred thirty".