42538777 has 24 divisors (see below), whose sum is σ = 48727040. Its totient is φ = 37013760.

The previous prime is 42538759. The next prime is 42538817. The reversal of 42538777 is 77783524.

It is a de Polignac number, because none of the positive numbers 2^k-42538777 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (329280) is a multiple of the sum of its prime divisors (224).

It is not an unprimeable number, because it can be changed into a prime (42538747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334888 + ... + 335014.

Almost surely, 2^42538777 is an apocalyptic number.

It is an amenable number.

42538777 is a deficient number, since it is larger than the sum of its proper divisors (6188263).

42538777 is a wasteful number, since it uses less digits than its factorization.

42538777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 224 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 42538777 is about 6522.1757872661. The cubic root of 42538777 is about 349.0827054998.

The spelling of 42538777 in words is "forty-two million, five hundred thirty-eight thousand, seven hundred seventy-seven".