47421318 has 48 divisors (see below), whose sum is σ = 111489264. Its totient is φ = 13406400.

The previous prime is 47421299. The next prime is 47421337. The reversal of 47421318 is 81312474.

It is an interprime number because it is at equal distance from previous prime (47421299) and next prime (47421337).

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, 28896 + ... + 30492.

It is an arithmetic number, because the mean of its divisors is an integer number (2322693).

Almost surely, 2^47421318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47421318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55744632).

47421318 is an abundant number, since it is smaller than the sum of its proper divisors (64067946).

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

47421318 is a wasteful number, since it uses less digits than its factorization.

47421318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1710 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 47421318 is about 6886.3138180016. The cubic root of 47421318 is about 361.9577446278.

The spelling of 47421318 in words is "forty-seven million, four hundred twenty-one thousand, three hundred eighteen".