47689818 has 64 divisors (see below), whose sum is σ = 109002240. Its totient is φ = 13780800.

The previous prime is 47689801. The next prime is 47689823. The reversal of 47689818 is 81898674.

It is a super-3 number, since 3×47689818³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143913 + ... + 144243.

It is an arithmetic number, because the mean of its divisors is an integer number (1703160).

Almost surely, 2^47689818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47689818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54501120).

47689818 is an abundant number, since it is smaller than the sum of its proper divisors (61312422).

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

47689818 is a wasteful number, since it uses less digits than its factorization.

47689818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its digits is 774144, while the sum is 51.

The square root of 47689818 is about 6905.7814908959. The cubic root of 47689818 is about 362.6395955425.

Subtracting 47689818 from its reverse (81898674), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 47689818 in words is "forty-seven million, six hundred eighty-nine thousand, eight hundred eighteen".