49878685 has 4 divisors (see below), whose sum is σ = 59854428. Its totient is φ = 39902944.

The previous prime is 49878649. The next prime is 49878691. The reversal of 49878685 is 58687894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58687894 = 2 ⋅29343947.

It can be written as a sum of positive squares in 2 ways, for example, as 36650916 + 13227769 = 6054^2 + 3637^2 .

It is a cyclic number.

It is not a de Polignac number, because 49878685 - 2⁷ = 49878557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4987864 + ... + 4987873.

It is an arithmetic number, because the mean of its divisors is an integer number (14963607).

Almost surely, 2^49878685 is an apocalyptic number.

It is an amenable number.

49878685 is a deficient number, since it is larger than the sum of its proper divisors (9975743).

49878685 is an equidigital number, since it uses as much as digits as its factorization.

49878685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975742.

The product of its digits is 3870720, while the sum is 55.

The square root of 49878685 is about 7062.4843362658. The cubic root of 49878685 is about 368.1049563774.

The spelling of 49878685 in words is "forty-nine million, eight hundred seventy-eight thousand, six hundred eighty-five".