47143778 has 12 divisors (see below), whose sum is σ = 77729190. Its totient is φ = 21428880.

The previous prime is 47143757. The next prime is 47143793. The reversal of 47143778 is 87734174.

It can be written as a sum of positive squares in only one way, i.e., 41126569 + 6017209 = 6413^2 + 2453^2 .

It is a super-2 number, since 2×47143778² = 4445071608226568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97163 + ... + 97646.

Almost surely, 2^47143778 is an apocalyptic number.

47143778 is a deficient number, since it is larger than the sum of its proper divisors (30585412).

47143778 is a wasteful number, since it uses less digits than its factorization.

47143778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194833 (or 194822 counting only the distinct ones).

The product of its digits is 131712, while the sum is 41.

The square root of 47143778 is about 6866.1326815027. The cubic root of 47143778 is about 361.2502261705.

The spelling of 47143778 in words is "forty-seven million, one hundred forty-three thousand, seven hundred seventy-eight".