42789549 has 16 divisors (see below), whose sum is σ = 62392320. Its totient is φ = 25869360.

The previous prime is 42789547. The next prime is 42789563. The reversal of 42789549 is 94598724.

It is not a de Polignac number, because 42789549 - 2¹ = 42789547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42789498 and 42789507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42789547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14454 + ... + 17160.

It is an arithmetic number, because the mean of its divisors is an integer number (3899520).

Almost surely, 2^42789549 is an apocalyptic number.

It is an amenable number.

42789549 is a deficient number, since it is larger than the sum of its proper divisors (19602771).

42789549 is a wasteful number, since it uses less digits than its factorization.

42789549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200.

The product of its digits is 725760, while the sum is 48.

The square root of 42789549 is about 6541.3721037715. The cubic root of 42789549 is about 349.7673256282.

The spelling of 42789549 in words is "forty-two million, seven hundred eighty-nine thousand, five hundred forty-nine".