915284772 has 144 divisors (see below), whose sum is σ = 2482159680. Its totient is φ = 294772608.

The previous prime is 915284771. The next prime is 915284801. The reversal of 915284772 is 277482519.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (915284771) 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 47 ways as a sum of consecutive naturals, for example, 5615163 + ... + 5615325.

It is an arithmetic number, because the mean of its divisors is an integer number (17237220).

Almost surely, 2^915284772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915284772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241079840).

915284772 is an abundant number, since it is smaller than the sum of its proper divisors (1566874908).

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

915284772 is a wasteful number, since it uses less digits than its factorization.

915284772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 330 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 915284772 is about 30253.6736942805. The cubic root of 915284772 is about 970.9243931722.

The spelling of 915284772 in words is "nine hundred fifteen million, two hundred eighty-four thousand, seven hundred seventy-two".