47776978 has 8 divisors (see below), whose sum is σ = 74136780. Its totient is φ = 23064720.

The previous prime is 47776973. The next prime is 47776979. The reversal of 47776978 is 87967774.

It can be written as a sum of positive squares in 2 ways, for example, as 45064369 + 2712609 = 6713^2 + 1647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (47776973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411813 + ... + 411928.

Almost surely, 2^47776978 is an apocalyptic number.

47776978 is a deficient number, since it is larger than the sum of its proper divisors (26359802).

47776978 is a wasteful number, since it uses less digits than its factorization.

47776978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823772.

The product of its digits is 4148928, while the sum is 55.

The square root of 47776978 is about 6912.0892644699. The cubic root of 47776978 is about 362.8603864237.

The spelling of 47776978 in words is "forty-seven million, seven hundred seventy-six thousand, nine hundred seventy-eight".