9778401 has 10 divisors (see below), whose sum is σ = 14607362. Its totient is φ = 6518880.

The previous prime is 9778387. The next prime is 9778403. The reversal of 9778401 is 1048779.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 4511376 = 2295^2 + 2124^2 .

It is not a de Polignac number, because 9778401 - 2⁶ = 9778337 is a prime.

It is a super-2 number, since 2×9778401² = 191234252233602, which contains 22 as substring.

It is a Duffinian number.

9778401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9778403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60280 + ... + 60441.

Almost surely, 2^9778401 is an apocalyptic number.

It is an amenable number.

9778401 is a deficient number, since it is larger than the sum of its proper divisors (4828961).

9778401 is a wasteful number, since it uses less digits than its factorization.

9778401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120733 (or 120724 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 9778401 is about 3127.0434918626. The cubic root of 9778401 is about 213.8401651002.

The spelling of 9778401 in words is "nine million, seven hundred seventy-eight thousand, four hundred one".