49315978 has 16 divisors (see below), whose sum is σ = 76688640. Its totient is φ = 23760000.

The previous prime is 49315957. The next prime is 49315991. The reversal of 49315978 is 87951394.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13978 + ... + 17146.

It is an arithmetic number, because the mean of its divisors is an integer number (4793040).

Almost surely, 2^49315978 is an apocalyptic number.

49315978 is a deficient number, since it is larger than the sum of its proper divisors (27372662).

49315978 is a wasteful number, since it uses less digits than its factorization.

49315978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453.

The product of its digits is 272160, while the sum is 46.

The square root of 49315978 is about 7022.5335883853. The cubic root of 49315978 is about 366.7154577864.

It can be divided in two parts, 493 and 15978, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 49315978 in words is "forty-nine million, three hundred fifteen thousand, nine hundred seventy-eight".