71989750 has 64 divisors (see below), whose sum is σ = 159105024. Its totient is φ = 23868000.

The previous prime is 71989739. The next prime is 71989751. The reversal of 71989750 is 5798917.

It is a self number, because there is not a number n which added to its sum of digits gives 71989750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71989751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53587 + ... + 54913.

It is an arithmetic number, because the mean of its divisors is an integer number (2486016).

Almost surely, 2^71989750 is an apocalyptic number.

71989750 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71989750 is an abundant number, since it is smaller than the sum of its proper divisors (87115274).

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

71989750 is a wasteful number, since it uses less digits than its factorization.

71989750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 71989750 is about 8484.6773656987. The cubic root of 71989750 is about 415.9970221372.

The spelling of 71989750 in words is "seventy-one million, nine hundred eighty-nine thousand, seven hundred fifty".