49028978 has 4 divisors (see below), whose sum is σ = 73543470. Its totient is φ = 24514488.

The previous prime is 49028971. The next prime is 49028981. The reversal of 49028978 is 87982094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87982094 = 2 ⋅43991047.

It can be written as a sum of positive squares in only one way, i.e., 27804529 + 21224449 = 5273^2 + 4607^2 .

It is not an unprimeable number, because it can be changed into a prime (49028971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12257243 + ... + 12257246.

Almost surely, 2^49028978 is an apocalyptic number.

49028978 is a deficient number, since it is larger than the sum of its proper divisors (24514492).

49028978 is a wasteful number, since it uses less digits than its factorization.

49028978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24514491.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 49028978 is about 7002.0695512113. The cubic root of 49028978 is about 366.0026924066.

The spelling of 49028978 in words is "forty-nine million, twenty-eight thousand, nine hundred seventy-eight".