71652420 has 288 divisors, whose sum is σ = 271514880. Its totient is φ = 14929920.

The previous prime is 71652409. The next prime is 71652473. The reversal of 71652420 is 2425617.

71652420 is a `hidden beast` number, since 7 + 1 + 652 + 4 + 2 + 0 = 666.

It is a zygodrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 981504 + ... + 981576.

It is an arithmetic number, because the mean of its divisors is an integer number (942760).

Almost surely, 2^71652420 is an apocalyptic number.

71652420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71652420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135757440).

71652420 is an abundant number, since it is smaller than the sum of its proper divisors (199862460).

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

71652420 is a wasteful number, since it uses less digits than its factorization.

71652420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 71652420 is about 8464.7752480500. The cubic root of 71652420 is about 415.3462441605.

The spelling of 71652420 in words is "seventy-one million, six hundred fifty-two thousand, four hundred twenty".