71646228 has 48 divisors (see below), whose sum is σ = 196680960. Its totient is φ = 22476672.

The previous prime is 71646221. The next prime is 71646247. The reversal of 71646228 is 82264617.

71646228 is a `hidden beast` number, since 7 + 1 + 646 + 2 + 2 + 8 = 666.

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

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 71646192 and 71646201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71646221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17676 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (4097520).

Almost surely, 2^71646228 is an apocalyptic number.

It is an amenable number.

71646228 is an abundant number, since it is smaller than the sum of its proper divisors (125034732).

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

71646228 is a wasteful number, since it uses less digits than its factorization.

71646228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39053 (or 39045 counting only the distinct ones).

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

The square root of 71646228 is about 8464.4094891493. The cubic root of 71646228 is about 415.3342794656.

The spelling of 71646228 in words is "seventy-one million, six hundred forty-six thousand, two hundred twenty-eight".