49191778 has 16 divisors (see below), whose sum is σ = 78306264. Its totient is φ = 23096320.

The previous prime is 49191767. The next prime is 49191787. The reversal of 49191778 is 87719194.

It can be written as a sum of positive squares in 4 ways, for example, as 35964009 + 13227769 = 5997^2 + 3637^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16326 + ... + 19102.

Almost surely, 2^49191778 is an apocalyptic number.

49191778 is a deficient number, since it is larger than the sum of its proper divisors (29114486).

49191778 is a wasteful number, since it uses less digits than its factorization.

49191778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317.

The product of its digits is 127008, while the sum is 46.

The square root of 49191778 is about 7013.6850513835. The cubic root of 49191778 is about 366.4073470381.

The spelling of 49191778 in words is "forty-nine million, one hundred ninety-one thousand, seven hundred seventy-eight".