978380636 has 12 divisors (see below), whose sum is σ = 1744471512. Its totient is φ = 479960208.

The previous prime is 978380633. The next prime is 978380653. The reversal of 978380636 is 636083879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978380633) 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, 2307290 + ... + 2307713.

It is an arithmetic number, because the mean of its divisors is an integer number (145372626).

Almost surely, 2^978380636 is an apocalyptic number.

It is an amenable number.

978380636 is a deficient number, since it is larger than the sum of its proper divisors (766090876).

978380636 is a wasteful number, since it uses less digits than its factorization.

978380636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615060 (or 4615058 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 978380636 is about 31279.0766487759. The cubic root of 978380636 is about 992.7409794548.

The spelling of 978380636 in words is "nine hundred seventy-eight million, three hundred eighty thousand, six hundred thirty-six".