71283620 has 12 divisors (see below), whose sum is σ = 149695644. Its totient is φ = 28513440.

The previous prime is 71283617. The next prime is 71283643. The reversal of 71283620 is 2638217.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11437924 + 59845696 = 3382^2 + 7736^2 .

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, 1782071 + ... + 1782110.

It is an arithmetic number, because the mean of its divisors is an integer number (12474637).

Almost surely, 2^71283620 is an apocalyptic number.

It is an amenable number.

71283620 is an abundant number, since it is smaller than the sum of its proper divisors (78412024).

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

71283620 is a wasteful number, since it uses less digits than its factorization.

71283620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564190 (or 3564188 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 71283620 is about 8442.9627501251. The cubic root of 71283620 is about 414.6324126864.

The spelling of 71283620 in words is "seventy-one million, two hundred eighty-three thousand, six hundred twenty".