71820460 has 12 divisors (see below), whose sum is σ = 150823008. Its totient is φ = 28728176.

The previous prime is 71820457. The next prime is 71820473. The reversal of 71820460 is 6402817.

It is a super-2 number, since 2×71820460² = 10316356949223200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795492 + ... + 1795531.

It is an arithmetic number, because the mean of its divisors is an integer number (12568584).

Almost surely, 2^71820460 is an apocalyptic number.

It is an amenable number.

71820460 is an abundant number, since it is smaller than the sum of its proper divisors (79002548).

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

71820460 is a wasteful number, since it uses less digits than its factorization.

71820460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591032 (or 3591030 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 71820460 is about 8474.6952747577. The cubic root of 71820460 is about 415.6706821102.

The spelling of 71820460 in words is "seventy-one million, eight hundred twenty thousand, four hundred sixty".