978041918 has 16 divisors (see below), whose sum is σ = 1679593344. Its totient is φ = 418423320.

The previous prime is 978041917. The next prime is 978041963. The reversal of 978041918 is 819140879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978041917) 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, 53180 + ... + 69167.

It is an arithmetic number, because the mean of its divisors is an integer number (104974584).

Almost surely, 2^978041918 is an apocalyptic number.

978041918 is a deficient number, since it is larger than the sum of its proper divisors (701551426).

978041918 is a wasteful number, since it uses less digits than its factorization.

978041918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122927.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 978041918 is about 31273.6617299606. The cubic root of 978041918 is about 992.6264030351.

The spelling of 978041918 in words is "nine hundred seventy-eight million, forty-one thousand, nine hundred eighteen".