42959890 has 16 divisors (see below), whose sum is σ = 77419800. Its totient is φ = 17163520.

The previous prime is 42959869. The next prime is 42959897. The reversal of 42959890 is 9895924.

It can be written as a sum of positive squares in 4 ways, for example, as 32455809 + 10504081 = 5697^2 + 3241^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42959890.

It is not an unprimeable number, because it can be changed into a prime (42959897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8586 + ... + 12634.

Almost surely, 2^42959890 is an apocalyptic number.

42959890 is a deficient number, since it is larger than the sum of its proper divisors (34459910).

42959890 is a wasteful number, since it uses less digits than its factorization.

42959890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 42959890 is about 6554.3794519390. The cubic root of 42959890 is about 350.2308409137.

The spelling of 42959890 in words is "forty-two million, nine hundred fifty-nine thousand, eight hundred ninety".