71220460 has 12 divisors (see below), whose sum is σ = 149563008. Its totient is φ = 28488176.

The previous prime is 71220439. The next prime is 71220469. The reversal of 71220460 is 6402217.

It is a super-2 number, since 2×71220460² = 10144707845223200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71220469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780492 + ... + 1780531.

It is an arithmetic number, because the mean of its divisors is an integer number (12463584).

Almost surely, 2^71220460 is an apocalyptic number.

It is an amenable number.

71220460 is an abundant number, since it is smaller than the sum of its proper divisors (78342548).

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

71220460 is a wasteful number, since it uses less digits than its factorization.

71220460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561032 (or 3561030 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 71220460 is about 8439.2215280795. The cubic root of 71220460 is about 414.5099164683.

Adding to 71220460 its reverse (6402217), we get a palindrome (77622677).

The spelling of 71220460 in words is "seventy-one million, two hundred twenty thousand, four hundred sixty".