9211987460 has 48 divisors (see below), whose sum is σ = 21551670000. Its totient is φ = 3284058624.

The previous prime is 9211987459. The next prime is 9211987507. The reversal of 9211987460 is 647891129.

It can be written as a sum of positive squares in 8 ways, for example, as 3215343616 + 5996643844 = 56704^2 + 77438^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603335 + ... + 618414.

It is an arithmetic number, because the mean of its divisors is an integer number (448993125).

Almost surely, 2^9211987460 is an apocalyptic number.

It is an amenable number.

9211987460 is an abundant number, since it is smaller than the sum of its proper divisors (12339682540).

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

9211987460 is a wasteful number, since it uses less digits than its factorization.

9211987460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221800 (or 1221798 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 9211987460 is about 95979.0990789141. The cubic root of 9211987460 is about 2096.2887937178.

The spelling of 9211987460 in words is "nine billion, two hundred eleven million, nine hundred eighty-seven thousand, four hundred sixty".