8978649 has 8 divisors (see below), whose sum is σ = 12026112. Its totient is φ = 5958480.

The previous prime is 8978639. The next prime is 8978663. The reversal of 8978649 is 9468798.

It is a happy number.

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

It is not a de Polignac number, because 8978649 - 2⁴ = 8978633 is a prime.

It is a super-2 number, since 2×8978649² = 161232275730402, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8⁷ + 9 + 7 + 8⁷ + 6⁴ + 4³ + 9⁷ .

It is not an unprimeable number, because it can be changed into a prime (8978639) 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, 6042 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (1503264).

Almost surely, 2^8978649 is an apocalyptic number.

It is an amenable number.

8978649 is a deficient number, since it is larger than the sum of its proper divisors (3047463).

8978649 is a wasteful number, since it uses less digits than its factorization.

8978649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13647.

The product of its digits is 870912, while the sum is 51.

The square root of 8978649 is about 2996.4393870059. The cubic root of 8978649 is about 207.8437636534.

The spelling of 8978649 in words is "eight million, nine hundred seventy-eight thousand, six hundred forty-nine".