71652290 has 16 divisors (see below), whose sum is σ = 131408568. Its totient is φ = 28119936.

The previous prime is 71652281. The next prime is 71652307. The reversal of 71652290 is 9225617.

It can be written as a sum of positive squares in 4 ways, for example, as 68873401 + 2778889 = 8299^2 + 1667^2 .

It is an unprimeable number.

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, 67067 + ... + 68126.

Almost surely, 2^71652290 is an apocalyptic number.

71652290 is a deficient number, since it is larger than the sum of its proper divisors (59756278).

71652290 is a wasteful number, since it uses less digits than its factorization.

71652290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135253.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 71652290 is about 8464.7675691657. The cubic root of 71652290 is about 415.3459929709.

The spelling of 71652290 in words is "seventy-one million, six hundred fifty-two thousand, two hundred ninety".