49991278 has 8 divisors (see below), whose sum is σ = 75760272. Its totient is φ = 24737856.

The previous prime is 49991267. The next prime is 49991281. The reversal of 49991278 is 87219994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128650 + ... + 129037.

It is an arithmetic number, because the mean of its divisors is an integer number (9470034).

Almost surely, 2^49991278 is an apocalyptic number.

49991278 is a deficient number, since it is larger than the sum of its proper divisors (25768994).

49991278 is a wasteful number, since it uses less digits than its factorization.

49991278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257786.

The product of its digits is 326592, while the sum is 49.

The square root of 49991278 is about 7070.4510464326. The cubic root of 49991278 is about 368.3817272032.

The spelling of 49991278 in words is "forty-nine million, nine hundred ninety-one thousand, two hundred seventy-eight".