978636241 has 8 divisors (see below), whose sum is σ = 1102042368. Its totient is φ = 860970000.

The previous prime is 978636203. The next prime is 978636247. The reversal of 978636241 is 142636879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 978636241 - 2⁹ = 978635729 is a prime.

It is a super-2 number, since 2×978636241² = 1915457784397220162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978636191 and 978636200.

It is not an unprimeable number, because it can be changed into a prime (978636247) 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, 1434610 + ... + 1435291.

It is an arithmetic number, because the mean of its divisors is an integer number (137755296).

Almost surely, 2^978636241 is an apocalyptic number.

It is an amenable number.

978636241 is a deficient number, since it is larger than the sum of its proper divisors (123406127).

978636241 is a wasteful number, since it uses less digits than its factorization.

978636241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869943.

The product of its digits is 435456, while the sum is 46.

The square root of 978636241 is about 31283.1622602319. The cubic root of 978636241 is about 992.8274241555.

The spelling of 978636241 in words is "nine hundred seventy-eight million, six hundred thirty-six thousand, two hundred forty-one".