9915288732 has 60 divisors (see below), whose sum is σ = 26814359880. Its totient is φ = 3191124384.

The previous prime is 9915288727. The next prime is 9915288763. The reversal of 9915288732 is 2378825199.

9915288732 is a `hidden beast` number, since 9 + 9 + 1 + 528 + 87 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 518238 + ... + 537029.

It is an arithmetic number, because the mean of its divisors is an integer number (446905998).

Almost surely, 2^9915288732 is an apocalyptic number.

It is an amenable number.

9915288732 is an abundant number, since it is smaller than the sum of its proper divisors (16899071148).

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

9915288732 is a wasteful number, since it uses less digits than its factorization.

9915288732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055312 (or 1055301 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 9915288732 is about 99575.5428405992. The cubic root of 9915288732 is about 2148.3339342257. Note that the first 3 decimals are identical.

The spelling of 9915288732 in words is "nine billion, nine hundred fifteen million, two hundred eighty-eight thousand, seven hundred thirty-two".