42787869 has 8 divisors (see below), whose sum is σ = 57127392. Its totient is φ = 28486800.

The previous prime is 42787853. The next prime is 42787891. The reversal of 42787869 is 96878724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42787869 - 2⁴ = 42787853 is a prime.

It is a super-2 number, since 2×42787869² = 3661603467122322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42787819) 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, 6907 + ... + 11544.

It is an arithmetic number, because the mean of its divisors is an integer number (7140924).

Almost surely, 2^42787869 is an apocalyptic number.

It is an amenable number.

42787869 is a deficient number, since it is larger than the sum of its proper divisors (14339523).

42787869 is a wasteful number, since it uses less digits than its factorization.

42787869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19227.

The product of its digits is 1354752, while the sum is 51.

The square root of 42787869 is about 6541.2436890854. The cubic root of 42787869 is about 349.7627480556.

The spelling of 42787869 in words is "forty-two million, seven hundred eighty-seven thousand, eight hundred sixty-nine".