49619865 has 32 divisors (see below), whose sum is σ = 81567360. Its totient is φ = 25749504.

The previous prime is 49619861. The next prime is 49619873. The reversal of 49619865 is 56891694.

It is not a de Polignac number, because 49619865 - 2² = 49619861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49619861) 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, 97231 + ... + 97739.

It is an arithmetic number, because the mean of its divisors is an integer number (2548980).

Almost surely, 2^49619865 is an apocalyptic number.

It is an amenable number.

49619865 is a deficient number, since it is larger than the sum of its proper divisors (31947495).

49619865 is a wasteful number, since it uses less digits than its factorization.

49619865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 466560, while the sum is 48.

The square root of 49619865 is about 7044.1369237118. The cubic root of 49619865 is about 367.4671542675.

The spelling of 49619865 in words is "forty-nine million, six hundred nineteen thousand, eight hundred sixty-five".