49442978 has 24 divisors (see below), whose sum is σ = 84546000. Its totient is φ = 21615984.

The previous prime is 49442977. The next prime is 49443041. The reversal of 49442978 is 87924494.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (49442977) 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, 2573 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (3522750).

Almost surely, 2^49442978 is an apocalyptic number.

49442978 is a deficient number, since it is larger than the sum of its proper divisors (35103022).

49442978 is a wasteful number, since it uses less digits than its factorization.

49442978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746 (or 7733 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 49442978 is about 7031.5700949361. The cubic root of 49442978 is about 367.0299802022.

The spelling of 49442978 in words is "forty-nine million, four hundred forty-two thousand, nine hundred seventy-eight".