42689628 has 18 divisors (see below), whose sum is σ = 107909984. Its totient is φ = 14229864.

The previous prime is 42689623. The next prime is 42689629. The reversal of 42689628 is 82698624.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×42689628³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42689623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592876 + ... + 592947.

Almost surely, 2^42689628 is an apocalyptic number.

It is an amenable number.

42689628 is an abundant number, since it is smaller than the sum of its proper divisors (65220356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42689628 is a wasteful number, since it uses less digits than its factorization.

42689628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185833 (or 1185828 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 42689628 is about 6533.7300219706. The cubic root of 42689628 is about 349.4948576917.

The spelling of 42689628 in words is "forty-two million, six hundred eighty-nine thousand, six hundred twenty-eight".