49158891 has 12 divisors (see below), whose sum is σ = 71660160. Its totient is φ = 32471280.

The previous prime is 49158887. The next prime is 49158899. The reversal of 49158891 is 19885194.

It is not a de Polignac number, because 49158891 - 2² = 49158887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49158899) 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, 24075 + ... + 26036.

It is an arithmetic number, because the mean of its divisors is an integer number (5971680).

Almost surely, 2^49158891 is an apocalyptic number.

49158891 is a deficient number, since it is larger than the sum of its proper divisors (22501269).

49158891 is a wasteful number, since it uses less digits than its factorization.

49158891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50226 (or 50223 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 49158891 is about 7011.3401714651. The cubic root of 49158891 is about 366.3256753628.

The spelling of 49158891 in words is "forty-nine million, one hundred fifty-eight thousand, eight hundred ninety-one".