978649461 has 24 divisors (see below), whose sum is σ = 1457314560. Its totient is φ = 632563776.

The previous prime is 978649423. The next prime is 978649481. The reversal of 978649461 is 164946879.

978649461 is a `hidden beast` number, since 97 + 8 + 6 + 494 + 61 = 666.

It is not a de Polignac number, because 978649461 - 2⁹ = 978648949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978649398 and 978649407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978649411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26140 + ... + 51386.

It is an arithmetic number, because the mean of its divisors is an integer number (60721440).

Almost surely, 2^978649461 is an apocalyptic number.

It is an amenable number.

978649461 is a deficient number, since it is larger than the sum of its proper divisors (478665099).

978649461 is a wasteful number, since it uses less digits than its factorization.

978649461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25385 (or 25382 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 978649461 is about 31283.3735552929. The cubic root of 978649461 is about 992.8318947030.

The spelling of 978649461 in words is "nine hundred seventy-eight million, six hundred forty-nine thousand, four hundred sixty-one".