9800778 has 16 divisors (see below), whose sum is σ = 21109536. Its totient is φ = 3015600.

The previous prime is 9800771. The next prime is 9800779. The reversal of 9800778 is 8770089.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (9800771) 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, 62748 + ... + 62903.

It is an arithmetic number, because the mean of its divisors is an integer number (1319346).

Almost surely, 2^9800778 is an apocalyptic number.

9800778 is an abundant number, since it is smaller than the sum of its proper divisors (11308758).

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

9800778 is a wasteful number, since it uses less digits than its factorization.

9800778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125669.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 9800778 is about 3130.6194275255. The cubic root of 9800778 is about 214.0031588901.

The spelling of 9800778 in words is "nine million, eight hundred thousand, seven hundred seventy-eight".