71760820 has 12 divisors (see below), whose sum is σ = 150697764. Its totient is φ = 28704320.

The previous prime is 71760817. The next prime is 71760839. The reversal of 71760820 is 2806717.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20466576 + 51294244 = 4524^2 + 7162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794001 + ... + 1794040.

It is an arithmetic number, because the mean of its divisors is an integer number (12558147).

Almost surely, 2^71760820 is an apocalyptic number.

It is an amenable number.

71760820 is an abundant number, since it is smaller than the sum of its proper divisors (78936944).

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

71760820 is a wasteful number, since it uses less digits than its factorization.

71760820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588050 (or 3588048 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 71760820 is about 8471.1758333776. The cubic root of 71760820 is about 415.5555920429. Note that the first 4 decimals are identical.

The spelling of 71760820 in words is "seventy-one million, seven hundred sixty thousand, eight hundred twenty".