47145778 has 16 divisors (see below), whose sum is σ = 72334080. Its totient is φ = 23040576.

The previous prime is 47145767. The next prime is 47145803. The reversal of 47145778 is 87754174.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14826 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (4520880).

Almost surely, 2^47145778 is an apocalyptic number.

47145778 is a deficient number, since it is larger than the sum of its proper divisors (25188302).

47145778 is a wasteful number, since it uses less digits than its factorization.

47145778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081.

The product of its digits is 219520, while the sum is 43.

The square root of 47145778 is about 6866.2783223519. The cubic root of 47145778 is about 361.2553345876.

The spelling of 47145778 in words is "forty-seven million, one hundred forty-five thousand, seven hundred seventy-eight".