47381886 has 48 divisors (see below), whose sum is σ = 107860896. Its totient is φ = 15003648.

The previous prime is 47381879. The next prime is 47381899. The reversal of 47381886 is 68818374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79606 + ... + 80198.

It is an arithmetic number, because the mean of its divisors is an integer number (2247102).

Almost surely, 2^47381886 is an apocalyptic number.

47381886 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 47381886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53930448).

47381886 is an abundant number, since it is smaller than the sum of its proper divisors (60479010).

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

47381886 is a wasteful number, since it uses less digits than its factorization.

47381886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 814 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 47381886 is about 6883.4501523582. The cubic root of 47381886 is about 361.8573911984.

The spelling of 47381886 in words is "forty-seven million, three hundred eighty-one thousand, eight hundred eighty-six".