915226380 has 72 divisors (see below), whose sum is σ = 2784377232. Its totient is φ = 243340416.

The previous prime is 915226369. The next prime is 915226397. The reversal of 915226380 is 83622519.

915226380 is a `hidden beast` number, since 9 + 15 + 2 + 2 + 638 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55134 + ... + 69786.

It is an arithmetic number, because the mean of its divisors is an integer number (38671906).

Almost surely, 2^915226380 is an apocalyptic number.

915226380 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915226380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392188616).

915226380 is an abundant number, since it is smaller than the sum of its proper divisors (1869150852).

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

915226380 is a wasteful number, since it uses less digits than its factorization.

915226380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015 (or 15010 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 915226380 is about 30252.7086390624. The cubic root of 915226380 is about 970.9037455280.

Adding to 915226380 its reverse (83622519), we get a palindrome (998848899).

The spelling of 915226380 in words is "nine hundred fifteen million, two hundred twenty-six thousand, three hundred eighty".