1215385488 has 60 divisors (see below), whose sum is σ = 3601480428. Its totient is φ = 381296640.

The previous prime is 1215385469. The next prime is 1215385489. The reversal of 1215385488 is 8845835121.

1215385488 is a `hidden beast` number, since 12 + 153 + 8 + 5 + 488 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1021953024 + 193432464 = 31968^2 + 13908^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1215385489) 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 11 ways as a sum of consecutive naturals, for example, 245793 + ... + 250688.

Almost surely, 2^1215385488 is an apocalyptic number.

1215385488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1215385488 is an abundant number, since it is smaller than the sum of its proper divisors (2386094940).

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

1215385488 is a wasteful number, since it uses less digits than its factorization.

1215385488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496512 (or 496503 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 1215385488 is about 34862.3792647605. The cubic root of 1215385488 is about 1067.1808304172.

The spelling of 1215385488 in words is "one billion, two hundred fifteen million, three hundred eighty-five thousand, four hundred eighty-eight".