71850220 has 24 divisors (see below), whose sum is σ = 162492624. Its totient is φ = 26529216.

The previous prime is 71850217. The next prime is 71850227. The reversal of 71850220 is 2205817.

It is a super-2 number, since 2×71850220² = 10324908228096800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71850227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137914 + ... + 138433.

It is an arithmetic number, because the mean of its divisors is an integer number (6770526).

Almost surely, 2^71850220 is an apocalyptic number.

It is an amenable number.

71850220 is an abundant number, since it is smaller than the sum of its proper divisors (90642404).

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

71850220 is a wasteful number, since it uses less digits than its factorization.

71850220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276369 (or 276367 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 71850220 is about 8476.4509082516. The cubic root of 71850220 is about 415.7280875314.

The spelling of 71850220 in words is "seventy-one million, eight hundred fifty thousand, two hundred twenty".