49287978 has 24 divisors (see below), whose sum is σ = 107106948. Its totient is φ = 16380672.

The previous prime is 49287977. The next prime is 49287983. The reversal of 49287978 is 87978294.

49287978 is a `hidden beast` number, since 492 + 87 + 9 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 48483369 + 804609 = 6963^2 + 897^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49287971) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2476 + ... + 10232.

Almost surely, 2^49287978 is an apocalyptic number.

49287978 is an abundant number, since it is smaller than the sum of its proper divisors (57818970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49287978 is a wasteful number, since it uses less digits than its factorization.

49287978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118 (or 8115 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 49287978 is about 7020.5397228418. The cubic root of 49287978 is about 366.6460416314.

The spelling of 49287978 in words is "forty-nine million, two hundred eighty-seven thousand, nine hundred seventy-eight".