42415989 has 32 divisors (see below), whose sum is σ = 71070720. Its totient is φ = 21859200.

The previous prime is 42415981. The next prime is 42416027. The reversal of 42415989 is 98951424.

It is not a de Polignac number, because 42415989 - 2³ = 42415981 is a prime.

It is a super-2 number, since 2×42415989² = 3598232245696242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42415989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42415981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31449 + ... + 32769.

It is an arithmetic number, because the mean of its divisors is an integer number (2220960).

Almost surely, 2^42415989 is an apocalyptic number.

It is an amenable number.

42415989 is a deficient number, since it is larger than the sum of its proper divisors (28654731).

42415989 is a wasteful number, since it uses less digits than its factorization.

42415989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481.

The product of its digits is 103680, while the sum is 42.

The square root of 42415989 is about 6512.7558682942. The cubic root of 42415989 is about 348.7465065618.

The spelling of 42415989 in words is "forty-two million, four hundred fifteen thousand, nine hundred eighty-nine".