9991464 has 32 divisors (see below), whose sum is σ = 28547520. Its totient is φ = 2854656.

The previous prime is 9991463. The next prime is 9991469. The reversal of 9991464 is 4641999.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (9991463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29569 + ... + 29904.

It is an arithmetic number, because the mean of its divisors is an integer number (892110).

Almost surely, 2^9991464 is an apocalyptic number.

It is an amenable number.

9991464 is an abundant number, since it is smaller than the sum of its proper divisors (18556056).

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

9991464 is a wasteful number, since it uses less digits than its factorization.

9991464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59489 (or 59485 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 9991464 is about 3160.9277119226. The cubic root of 9991464 is about 215.3821507044.

The spelling of 9991464 in words is "nine million, nine hundred ninety-one thousand, four hundred sixty-four".