978744 has 32 divisors (see below), whose sum is σ = 2635920. Its totient is φ = 301056.

The previous prime is 978743. The next prime is 978749. The reversal of 978744 is 447879.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978743) 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 7 ways as a sum of consecutive naturals, for example, 1257 + ... + 1880.

2⁹⁷⁸⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

978744 is an abundant number, since it is smaller than the sum of its proper divisors (1657176).

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

978744 is a wasteful number, since it uses less digits than its factorization.

978744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159 (or 3155 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 978744 is about 989.3149144736. The cubic root of 978744 is about 99.2863863355.

The spelling of 978744 in words is "nine hundred seventy-eight thousand, seven hundred forty-four".