868121472 has 32 divisors (see below), whose sum is σ = 2305948680. Its totient is φ = 289373696.

The previous prime is 868121377. The next prime is 868121497. The reversal of 868121472 is 274121868.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 868121472.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129983 + ... + 1130750.

Almost surely, 2^868121472 is an apocalyptic number.

It is an amenable number.

868121472 is an abundant number, since it is smaller than the sum of its proper divisors (1437827208).

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

868121472 is a wasteful number, since it uses less digits than its factorization.

868121472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260750 (or 2260738 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 868121472 is about 29463.9011673607. The cubic root of 868121472 is about 953.9526806076.

The spelling of 868121472 in words is "eight hundred sixty-eight million, one hundred twenty-one thousand, four hundred seventy-two".