978438542 has 16 divisors (see below), whose sum is σ = 1491825600. Its totient is φ = 481210080.

The previous prime is 978438541. The next prime is 978438557. The reversal of 978438542 is 245834879.

978438542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978438541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30992 + ... + 54012.

It is an arithmetic number, because the mean of its divisors is an integer number (93239100).

Almost surely, 2^978438542 is an apocalyptic number.

978438542 is a deficient number, since it is larger than the sum of its proper divisors (513387058).

978438542 is a wasteful number, since it uses less digits than its factorization.

978438542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23371.

The product of its digits is 1935360, while the sum is 50.

The square root of 978438542 is about 31280.0022698209. The cubic root of 978438542 is about 992.7605643768.

The spelling of 978438542 in words is "nine hundred seventy-eight million, four hundred thirty-eight thousand, five hundred forty-two".