49567978 has 4 divisors (see below), whose sum is σ = 74351970. Its totient is φ = 24783988.

The previous prime is 49567963. The next prime is 49567981. The reversal of 49567978 is 87976594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87976594 = 2 ⋅43988297.

It can be written as a sum of positive squares in only one way, i.e., 34845409 + 14722569 = 5903^2 + 3837^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12391993 + ... + 12391996.

Almost surely, 2^49567978 is an apocalyptic number.

49567978 is a deficient number, since it is larger than the sum of its proper divisors (24783992).

49567978 is a wasteful number, since it uses less digits than its factorization.

49567978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24783991.

The product of its digits is 3810240, while the sum is 55.

The square root of 49567978 is about 7040.4529683821. The cubic root of 49567978 is about 367.3390240111.

The spelling of 49567978 in words is "forty-nine million, five hundred sixty-seven thousand, nine hundred seventy-eight".