42787628 has 12 divisors (see below), whose sum is σ = 80638320. Its totient is φ = 19748112.

The previous prime is 42787627. The next prime is 42787643. The reversal of 42787628 is 82678724.

It is a super-2 number, since 2×42787628² = 3661562219732768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42787621) 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, 411368 + ... + 411471.

It is an arithmetic number, because the mean of its divisors is an integer number (6719860).

Almost surely, 2^42787628 is an apocalyptic number.

It is an amenable number.

42787628 is a deficient number, since it is larger than the sum of its proper divisors (37850692).

42787628 is a wasteful number, since it uses less digits than its factorization.

42787628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822856 (or 822854 counting only the distinct ones).

The product of its digits is 301056, while the sum is 44.

The square root of 42787628 is about 6541.2252674862. The cubic root of 42787628 is about 349.7620913821.

The spelling of 42787628 in words is "forty-two million, seven hundred eighty-seven thousand, six hundred twenty-eight".