42749648 has 20 divisors (see below), whose sum is σ = 83827968. Its totient is φ = 21116640.

The previous prime is 42749621. The next prime is 42749659. The reversal of 42749648 is 84694724.

It is a junction number, because it is equal to n+sod(n) for n = 42749599 and 42749608.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14768 + ... + 17423.

Almost surely, 2^42749648 is an apocalyptic number.

It is an amenable number.

42749648 is a deficient number, since it is larger than the sum of its proper divisors (41078320).

42749648 is a wasteful number, since it uses less digits than its factorization.

42749648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32282 (or 32276 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 42749648 is about 6538.3214971428. The cubic root of 42749648 is about 349.6585731671.

The spelling of 42749648 in words is "forty-two million, seven hundred forty-nine thousand, six hundred forty-eight".