47023218 has 96 divisors (see below), whose sum is σ = 117891072. Its totient is φ = 13413600.

The previous prime is 47023217. The next prime is 47023237. The reversal of 47023218 is 81232074.

It is a super-2 number, since 2×47023218² = 4422366062151048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47023191 and 47023200.

It is not an unprimeable number, because it can be changed into a prime (47023211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288405 + ... + 288567.

It is an arithmetic number, because the mean of its divisors is an integer number (1228032).

Almost surely, 2^47023218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47023218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58945536).

47023218 is an abundant number, since it is smaller than the sum of its proper divisors (70867854).

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

47023218 is a wasteful number, since it uses less digits than its factorization.

47023218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 47023218 is about 6857.3477380107. The cubic root of 47023218 is about 360.9420235673.

Subtracting 47023218 from its reverse (81232074), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 47023218 in words is "forty-seven million, twenty-three thousand, two hundred eighteen".