978854964 has 12 divisors (see below), whose sum is σ = 2283994944. Its totient is φ = 326284984.

The previous prime is 978854963. The next prime is 978854993. The reversal of 978854964 is 469458879.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 978854898 and 978854907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978854963) 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, 40785612 + ... + 40785635.

It is an arithmetic number, because the mean of its divisors is an integer number (190332912).

Almost surely, 2^978854964 is an apocalyptic number.

It is an amenable number.

978854964 is an abundant number, since it is smaller than the sum of its proper divisors (1305139980).

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

978854964 is a wasteful number, since it uses less digits than its factorization.

978854964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81571254 (or 81571252 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 978854964 is about 31286.6579231467. The cubic root of 978854964 is about 992.9013835450.

The spelling of 978854964 in words is "nine hundred seventy-eight million, eight hundred fifty-four thousand, nine hundred sixty-four".