49778457 has 12 divisors (see below), whose sum is σ = 66865680. Its totient is φ = 32940072.

The previous prime is 49778441. The next prime is 49778459. The reversal of 49778457 is 75487794.

It is not a de Polignac number, because 49778457 - 2⁴ = 49778441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49778459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118594 + ... + 119012.

It is an arithmetic number, because the mean of its divisors is an integer number (5572140).

Almost surely, 2^49778457 is an apocalyptic number.

It is an amenable number.

49778457 is a deficient number, since it is larger than the sum of its proper divisors (17087223).

49778457 is an equidigital number, since it uses as much as digits as its factorization.

49778457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 621 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 51.

The square root of 49778457 is about 7055.3849646919. The cubic root of 49778457 is about 367.8582299884.

The spelling of 49778457 in words is "forty-nine million, seven hundred seventy-eight thousand, four hundred fifty-seven".