49778739 has 32 divisors (see below), whose sum is σ = 78105600. Its totient is φ = 31268160.

The previous prime is 49778717. The next prime is 49778741. The reversal of 49778739 is 93787794.

It is not a de Polignac number, because 49778739 - 2⁸ = 49778483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49770739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43527 + ... + 44655.

It is an arithmetic number, because the mean of its divisors is an integer number (2440800).

Almost surely, 2^49778739 is an apocalyptic number.

49778739 is a deficient number, since it is larger than the sum of its proper divisors (28326861).

49778739 is a wasteful number, since it uses less digits than its factorization.

49778739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1226 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 49778739 is about 7055.4049493987. The cubic root of 49778739 is about 367.8589246385.

The spelling of 49778739 in words is "forty-nine million, seven hundred seventy-eight thousand, seven hundred thirty-nine".