71417820 has 48 divisors (see below), whose sum is σ = 200340000. Its totient is φ = 19009536.

The previous prime is 71417809. The next prime is 71417821. The reversal of 71417820 is 2871417.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71417821) 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, 56556 + ... + 57804.

It is an arithmetic number, because the mean of its divisors is an integer number (4173750).

Almost surely, 2^71417820 is an apocalyptic number.

It is an amenable number.

71417820 is an abundant number, since it is smaller than the sum of its proper divisors (128922180).

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

71417820 is a wasteful number, since it uses less digits than its factorization.

71417820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 71417820 is about 8450.9064602562. The cubic root of 71417820 is about 414.8924480569.

The spelling of 71417820 in words is "seventy-one million, four hundred seventeen thousand, eight hundred twenty".