49161878 has 4 divisors (see below), whose sum is σ = 73742820. Its totient is φ = 24580938.

The previous prime is 49161869. The next prime is 49161901. The reversal of 49161878 is 87816194.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12290468 + ... + 12290471.

It is an arithmetic number, because the mean of its divisors is an integer number (18435705).

Almost surely, 2^49161878 is an apocalyptic number.

49161878 is a deficient number, since it is larger than the sum of its proper divisors (24580942).

49161878 is a wasteful number, since it uses less digits than its factorization.

49161878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24580941.

The product of its digits is 96768, while the sum is 44.

The square root of 49161878 is about 7011.5531802875. The cubic root of 49161878 is about 366.3330947913. Note that the first 3 decimals are identical.

The spelling of 49161878 in words is "forty-nine million, one hundred sixty-one thousand, eight hundred seventy-eight".