47091878 has 16 divisors (see below), whose sum is σ = 73160496. Its totient is φ = 22719840.

The previous prime is 47091871. The next prime is 47091881. The reversal of 47091878 is 87819074.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47091871) 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, 2825 + ... + 10107.

It is an arithmetic number, because the mean of its divisors is an integer number (4572531).

Almost surely, 2^47091878 is an apocalyptic number.

47091878 is a deficient number, since it is larger than the sum of its proper divisors (26068618).

47091878 is a wasteful number, since it uses less digits than its factorization.

47091878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7399.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 47091878 is about 6862.3522206311. The cubic root of 47091878 is about 361.1176121977.

The spelling of 47091878 in words is "forty-seven million, ninety-one thousand, eight hundred seventy-eight".