978397444 has 6 divisors (see below), whose sum is σ = 1712195534. Its totient is φ = 489198720.

The previous prime is 978397439. The next prime is 978397451. The reversal of 978397444 is 444793879.

It can be written as a sum of positive squares in only one way, i.e., 554037444 + 424360000 = 23538^2 + 20600^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122299677 + ... + 122299684.

Almost surely, 2^978397444 is an apocalyptic number.

It is an amenable number.

978397444 is a deficient number, since it is larger than the sum of its proper divisors (733798090).

978397444 is a wasteful number, since it uses less digits than its factorization.

978397444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244599365 (or 244599363 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 55.

The square root of 978397444 is about 31279.3453256298. The cubic root of 978397444 is about 992.7466643230.

The spelling of 978397444 in words is "nine hundred seventy-eight million, three hundred ninety-seven thousand, four hundred forty-four".