47166840 has 256 divisors, whose sum is σ = 190771200. Its totient is φ = 10119168.

The previous prime is 47166827. The next prime is 47166853. The reversal of 47166840 is 4866174.

It is an interprime number because it is at equal distance from previous prime (47166827) and next prime (47166853).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47166795 and 47166804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128337 + ... + 128703.

It is an arithmetic number, because the mean of its divisors is an integer number (745200).

Almost surely, 2^47166840 is an apocalyptic number.

47166840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47166840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95385600).

47166840 is an abundant number, since it is smaller than the sum of its proper divisors (143604360).

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

47166840 is a wasteful number, since it uses less digits than its factorization.

47166840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 47166840 is about 6867.8118786117. The cubic root of 47166840 is about 361.3091225576.

The spelling of 47166840 in words is "forty-seven million, one hundred sixty-six thousand, eight hundred forty".