9978022402 has 8 divisors (see below), whose sum is σ = 15483138300. Its totient is φ = 4816976304.

The previous prime is 9978022393. The next prime is 9978022409. The reversal of 9978022402 is 2042208799.

It can be written as a sum of positive squares in 2 ways, for example, as 8586060921 + 1391961481 = 92661^2 + 37309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9978022409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86017377 + ... + 86017492.

Almost surely, 2^9978022402 is an apocalyptic number.

9978022402 is a deficient number, since it is larger than the sum of its proper divisors (5505115898).

9978022402 is a wasteful number, since it uses less digits than its factorization.

9978022402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172034900.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 9978022402 is about 99890.0515667101. The cubic root of 9978022402 is about 2152.8552223848.

The spelling of 9978022402 in words is "nine billion, nine hundred seventy-eight million, twenty-two thousand, four hundred two".