915447072 has 48 divisors (see below), whose sum is σ = 2410061472. Its totient is φ = 304258560.

The previous prime is 915447067. The next prime is 915447079. The reversal of 915447072 is 270744519.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 915447072.

It is not an unprimeable number, because it can be changed into a prime (915447079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19572 + ... + 47052.

It is an arithmetic number, because the mean of its divisors is an integer number (50209614).

Almost surely, 2^915447072 is an apocalyptic number.

It is an amenable number.

915447072 is an abundant number, since it is smaller than the sum of its proper divisors (1494614400).

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

915447072 is a wasteful number, since it uses less digits than its factorization.

915447072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27841 (or 27833 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 915447072 is about 30256.3558942580. The cubic root of 915447072 is about 970.9817784875.

The spelling of 915447072 in words is "nine hundred fifteen million, four hundred forty-seven thousand, seventy-two".