978742612 has 12 divisors (see below), whose sum is σ = 1732045140. Its totient is φ = 483872576.

The previous prime is 978742601. The next prime is 978742619. The reversal of 978742612 is 216247879.

It can be written as a sum of positive squares in 2 ways, for example, as 408201616 + 570540996 = 20204^2 + 23886^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978742619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374283 + ... + 1374994.

It is an arithmetic number, because the mean of its divisors is an integer number (144337095).

Almost surely, 2^978742612 is an apocalyptic number.

It is an amenable number.

978742612 is a deficient number, since it is larger than the sum of its proper divisors (753302528).

978742612 is a wasteful number, since it uses less digits than its factorization.

978742612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749370 (or 2749368 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 978742612 is about 31284.8623458694. The cubic root of 978742612 is about 992.8633940135.

It can be divided in two parts, 978 and 742612, that added together give a triangular number (743590 = T₁₂₁₉).

The spelling of 978742612 in words is "nine hundred seventy-eight million, seven hundred forty-two thousand, six hundred twelve".