71780232 has 32 divisors (see below), whose sum is σ = 182839680. Its totient is φ = 23474880.

The previous prime is 71780213. The next prime is 71780251. The reversal of 71780232 is 23208717.

It is an interprime number because it is at equal distance from previous prime (71780213) and next prime (71780251).

It is a self number, because there is not a number n which added to its sum of digits gives 71780232.

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, 26944 + ... + 29487.

It is an arithmetic number, because the mean of its divisors is an integer number (5713740).

Almost surely, 2^71780232 is an apocalyptic number.

It is an amenable number.

71780232 is an abundant number, since it is smaller than the sum of its proper divisors (111059448).

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

71780232 is a wasteful number, since it uses less digits than its factorization.

71780232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56493 (or 56489 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 71780232 is about 8472.3215236439. The cubic root of 71780232 is about 415.5930592749.

Adding to 71780232 its reverse (23208717), we get a palindrome (94988949).

The spelling of 71780232 in words is "seventy-one million, seven hundred eighty thousand, two hundred thirty-two".