49981678 has 4 divisors (see below), whose sum is σ = 74972520. Its totient is φ = 24990838.

The previous prime is 49981663. The next prime is 49981681. The reversal of 49981678 is 87618994.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12495418 + ... + 12495421.

It is an arithmetic number, because the mean of its divisors is an integer number (18743130).

Almost surely, 2^49981678 is an apocalyptic number.

49981678 is a deficient number, since it is larger than the sum of its proper divisors (24990842).

49981678 is a wasteful number, since it uses less digits than its factorization.

49981678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24990841.

The product of its digits is 870912, while the sum is 52.

The square root of 49981678 is about 7069.7721321129. The cubic root of 49981678 is about 368.3581451497.

The spelling of 49981678 in words is "forty-nine million, nine hundred eighty-one thousand, six hundred seventy-eight".