47149778 has 16 divisors (see below), whose sum is σ = 76628160. Its totient is φ = 21629136.

The previous prime is 47149771. The next prime is 47149787. The reversal of 47149778 is 87794174.

It is not an unprimeable number, because it can be changed into a prime (47149771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (4789260).

Almost surely, 2^47149778 is an apocalyptic number.

47149778 is a deficient number, since it is larger than the sum of its proper divisors (29478382).

47149778 is a wasteful number, since it uses less digits than its factorization.

47149778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11041.

The product of its digits is 395136, while the sum is 47.

The square root of 47149778 is about 6866.5695947831. The cubic root of 47149778 is about 361.2655509882.

The spelling of 47149778 in words is "forty-seven million, one hundred forty-nine thousand, seven hundred seventy-eight".