1815148332 has 72 divisors (see below), whose sum is σ = 4862919600. Its totient is φ = 585498240.

The previous prime is 1815148289. The next prime is 1815148343. The reversal of 1815148332 is 2338415181.

1815148332 is a `hidden beast` number, since 181 + 5 + 148 + 332 = 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, 95044 + ... + 112532.

It is an arithmetic number, because the mean of its divisors is an integer number (67540550).

Almost surely, 2^1815148332 is an apocalyptic number.

1815148332 is a gapful number since it is divisible by the number (12) 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 1815148332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2431459800).

1815148332 is an abundant number, since it is smaller than the sum of its proper divisors (3047771268).

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

1815148332 is a wasteful number, since it uses less digits than its factorization.

1815148332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17564 (or 17525 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1815148332 is about 42604.5576435198. The cubic root of 1815148332 is about 1219.8432863292.

The spelling of 1815148332 in words is "one billion, eight hundred fifteen million, one hundred forty-eight thousand, three hundred thirty-two".