9972578 has 54 divisors (see below), whose sum is σ = 19809153. Its totient is φ = 3751440.

The previous prime is 9972577. The next prime is 9972581. The reversal of 9972578 is 8752799.

It can be written as a sum of positive squares in 2 ways, for example, as 9966649 + 5929 = 3157^2 + 77^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2233.

Its product of digits (317520) is a multiple of the sum of its prime divisors (49).

It is not an unprimeable number, because it can be changed into a prime (9972577) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 343868 + ... + 343896.

Almost surely, 2^9972578 is an apocalyptic number.

9972578 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9972578 is a deficient number, since it is larger than the sum of its proper divisors (9836575).

9972578 is a wasteful number, since it uses less digits than its factorization.

9972578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 49 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 9972578 is about 3157.9388847791. The cubic root of 9972578 is about 215.2463590280.

The spelling of 9972578 in words is "nine million, nine hundred seventy-two thousand, five hundred seventy-eight".