9997420464 has 120 divisors (see below), whose sum is σ = 29228493840. Its totient is φ = 3308148864.

The previous prime is 9997420457. The next prime is 9997420483. The reversal of 9997420464 is 4640247999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

9997420464 is a `hidden beast` number, since 9 + 99 + 74 + 20 + 464 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9997420464.

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, 72973804 + ... + 72973940.

It is an arithmetic number, because the mean of its divisors is an integer number (243570782).

Almost surely, 2^9997420464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9997420464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14614246920).

9997420464 is an abundant number, since it is smaller than the sum of its proper divisors (19231073376).

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

9997420464 is an frugal number, since it uses more digits than its factorization.

9997420464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The square root of 9997420464 is about 99987.1014881420. The cubic root of 9997420464 is about 2154.2494260397.

The spelling of 9997420464 in words is "nine billion, nine hundred ninety-seven million, four hundred twenty thousand, four hundred sixty-four".