978018490 has 32 divisors (see below), whose sum is σ = 1803098880. Its totient is φ = 381825600.

The previous prime is 978018439. The next prime is 978018511. The reversal of 978018490 is 94810879.

It is a happy number.

978018490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 978018490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73791 + ... + 86029.

It is an arithmetic number, because the mean of its divisors is an integer number (56346840).

Almost surely, 2^978018490 is an apocalyptic number.

978018490 is a deficient number, since it is larger than the sum of its proper divisors (825080390).

978018490 is a wasteful number, since it uses less digits than its factorization.

978018490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 978018490 is about 31273.2871633284. The cubic root of 978018490 is about 992.6184771863.

The spelling of 978018490 in words is "nine hundred seventy-eight million, eighteen thousand, four hundred ninety".