49188815 has 16 divisors (see below), whose sum is σ = 66914400. Its totient is φ = 34411392.

The previous prime is 49188809. The next prime is 49188817. The reversal of 49188815 is 51888194.

It is a cyclic number.

It is not a de Polignac number, because 49188815 - 2¹⁶ = 49123279 is a prime.

It is a super-2 number, since 2×49188815² = 4839079042208450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49188817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18680 + ... + 21149.

It is an arithmetic number, because the mean of its divisors is an integer number (4182150).

Almost surely, 2^49188815 is an apocalyptic number.

49188815 is a deficient number, since it is larger than the sum of its proper divisors (17725585).

49188815 is a wasteful number, since it uses less digits than its factorization.

49188815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39866.

The product of its digits is 92160, while the sum is 44.

The square root of 49188815 is about 7013.4738183015. The cubic root of 49188815 is about 366.3999902072.

It can be divided in two parts, 4 and 9188815, that added together give a palindrome (9188819).

The spelling of 49188815 in words is "forty-nine million, one hundred eighty-eight thousand, eight hundred fifteen".