71527830 has 32 divisors (see below), whose sum is σ = 187273728. Its totient is φ = 17340000.

The previous prime is 71527829. The next prime is 71527831. The reversal of 71527830 is 3872517.

It is an interprime number because it is at equal distance from previous prime (71527829) and next prime (71527831).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 71527791 and 71527800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71527831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108046 + ... + 108705.

It is an arithmetic number, because the mean of its divisors is an integer number (5852304).

Almost surely, 2^71527830 is an apocalyptic number.

71527830 is an abundant number, since it is smaller than the sum of its proper divisors (115745898).

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

71527830 is a wasteful number, since it uses less digits than its factorization.

71527830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216772.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 71527830 is about 8457.4127249414. The cubic root of 71527830 is about 415.1053683190.

The spelling of 71527830 in words is "seventy-one million, five hundred twenty-seven thousand, eight hundred thirty".