47891418 has 16 divisors (see below), whose sum is σ = 95885856. Its totient is φ = 15946640.

The previous prime is 47891413. The next prime is 47891429. The reversal of 47891418 is 81419874.

It is a self number, because there is not a number n which added to its sum of digits gives 47891418.

It is not an unprimeable number, because it can be changed into a prime (47891413) 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, 2605 + ... + 10127.

It is an arithmetic number, because the mean of its divisors is an integer number (5992866).

Almost surely, 2^47891418 is an apocalyptic number.

47891418 is an abundant number, since it is smaller than the sum of its proper divisors (47994438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47891418 is a wasteful number, since it uses less digits than its factorization.

47891418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589.

The product of its digits is 64512, while the sum is 42.

The square root of 47891418 is about 6920.3625627564. The cubic root of 47891418 is about 363.1498747430.

The spelling of 47891418 in words is "forty-seven million, eight hundred ninety-one thousand, four hundred eighteen".