42758649 has 12 divisors (see below), whose sum is σ = 62143536. Its totient is φ = 28329912.

The previous prime is 42758647. The next prime is 42758669. The reversal of 42758649 is 94685724.

It is a happy number.

42758649 is a `hidden beast` number, since 4 + 27 + 586 + 49 = 666.

It is not a de Polignac number, because 42758649 - 2¹ = 42758647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42758647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13107 + ... + 16040.

It is an arithmetic number, because the mean of its divisors is an integer number (5178628).

Almost surely, 2^42758649 is an apocalyptic number.

It is an amenable number.

42758649 is a deficient number, since it is larger than the sum of its proper divisors (19384887).

42758649 is a wasteful number, since it uses less digits than its factorization.

42758649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29316 (or 29313 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 42758649 is about 6539.0097874219. The cubic root of 42758649 is about 349.6831118171.

The spelling of 42758649 in words is "forty-two million, seven hundred fifty-eight thousand, six hundred forty-nine".