49487978 has 8 divisors (see below), whose sum is σ = 76791780. Its totient is φ = 23890720.

The previous prime is 49487959. The next prime is 49487987. The reversal of 49487978 is 87978494.

It can be written as a sum of positive squares in 2 ways, for example, as 49182169 + 305809 = 7013^2 + 553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 426563 + ... + 426678.

Almost surely, 2^49487978 is an apocalyptic number.

49487978 is a deficient number, since it is larger than the sum of its proper divisors (27303802).

49487978 is a wasteful number, since it uses less digits than its factorization.

49487978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853272.

The product of its digits is 4064256, while the sum is 56.

The square root of 49487978 is about 7034.7692215168. The cubic root of 49487978 is about 367.1412959144.

The spelling of 49487978 in words is "forty-nine million, four hundred eighty-seven thousand, nine hundred seventy-eight".