9998770 has 16 divisors (see below), whose sum is σ = 18036288. Its totient is φ = 3990960.

The previous prime is 9998753. The next prime is 9998777. The reversal of 9998770 is 778999.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9998777) 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, 6187 + ... + 7633.

It is an arithmetic number, because the mean of its divisors is an integer number (1127268).

Almost surely, 2^9998770 is an apocalyptic number.

9998770 is a deficient number, since it is larger than the sum of its proper divisors (8037518).

9998770 is a wasteful number, since it uses less digits than its factorization.

9998770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 9998770 is about 3162.0831741116. The cubic root of 9998770 is about 215.4346354588.

The spelling of 9998770 in words is "nine million, nine hundred ninety-eight thousand, seven hundred seventy".