978775090 has 16 divisors (see below), whose sum is σ = 1818627840. Its totient is φ = 378880560.

The previous prime is 978775079. The next prime is 978775099. The reversal of 978775090 is 90577879.

It is not an unprimeable number, because it can be changed into a prime (978775099) 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, 1578360 + ... + 1578979.

It is an arithmetic number, because the mean of its divisors is an integer number (113664240).

Almost surely, 2^978775090 is an apocalyptic number.

978775090 is a deficient number, since it is larger than the sum of its proper divisors (839852750).

978775090 is a wasteful number, since it uses less digits than its factorization.

978775090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157377.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 978775090 is about 31285.3814104927. The cubic root of 978775090 is about 992.8743760838.

The spelling of 978775090 in words is "nine hundred seventy-eight million, seven hundred seventy-five thousand, ninety".