978145386 has 16 divisors (see below), whose sum is σ = 1968007104. Its totient is φ = 324095744.

The previous prime is 978145367. The next prime is 978145391. The reversal of 978145386 is 683541879.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487095 + ... + 489098.

It is an arithmetic number, because the mean of its divisors is an integer number (123000444).

Almost surely, 2^978145386 is an apocalyptic number.

978145386 is an abundant number, since it is smaller than the sum of its proper divisors (989861718).

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

978145386 is a wasteful number, since it uses less digits than its factorization.

978145386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976365.

The product of its digits is 1451520, while the sum is 51.

The square root of 978145386 is about 31275.3159216658. The cubic root of 978145386 is about 992.6614054364.

The spelling of 978145386 in words is "nine hundred seventy-eight million, one hundred forty-five thousand, three hundred eighty-six".