42646989 has 32 divisors (see below), whose sum is σ = 71230464. Its totient is φ = 22049280.

The previous prime is 42646973. The next prime is 42646993. The reversal of 42646989 is 98964624.

It is not a de Polignac number, because 42646989 - 2⁴ = 42646973 is a prime.

It is a super-2 number, since 2×42646989² = 3637531341532242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42646939) 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, 81282 + ... + 81804.

It is an arithmetic number, because the mean of its divisors is an integer number (2225952).

Almost surely, 2^42646989 is an apocalyptic number.

It is an amenable number.

42646989 is a deficient number, since it is larger than the sum of its proper divisors (28583475).

42646989 is a wasteful number, since it uses less digits than its factorization.

42646989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its digits is 746496, while the sum is 48.

The square root of 42646989 is about 6530.4662161288. The cubic root of 42646989 is about 349.3784588054.

The spelling of 42646989 in words is "forty-two million, six hundred forty-six thousand, nine hundred eighty-nine".