978428740 has 48 divisors (see below), whose sum is σ = 2202020352. Its totient is φ = 364231296.

The previous prime is 978428729. The next prime is 978428743. The reversal of 978428740 is 47824879.

It is not an unprimeable number, because it can be changed into a prime (978428743) 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 15 ways as a sum of consecutive naturals, for example, 11724 + ... + 45763.

It is an arithmetic number, because the mean of its divisors is an integer number (45875424).

Almost surely, 2^978428740 is an apocalyptic number.

It is an amenable number.

978428740 is an abundant number, since it is smaller than the sum of its proper divisors (1223591612).

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

978428740 is a wasteful number, since it uses less digits than its factorization.

978428740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57556 (or 57554 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 978428740 is about 31279.8455878542. The cubic root of 978428740 is about 992.7572492063.

The spelling of 978428740 in words is "nine hundred seventy-eight million, four hundred twenty-eight thousand, seven hundred forty".