8469978 has 32 divisors (see below), whose sum is σ = 19569600. Its totient is φ = 2415360.

The previous prime is 8469977. The next prime is 8469997. The reversal of 8469978 is 8799648.

It is a happy number.

8469978 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×8469978⁴ (a number of 29 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 8469978.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8469973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2653 + ... + 4896.

It is an arithmetic number, because the mean of its divisors is an integer number (611550).

Almost surely, 2^8469978 is an apocalyptic number.

8469978 is an abundant number, since it is smaller than the sum of its proper divisors (11099622).

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

8469978 is a wasteful number, since it uses less digits than its factorization.

8469978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7582.

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

The square root of 8469978 is about 2910.3226625239. The cubic root of 8469978 is about 203.8421982272.

The spelling of 8469978 in words is "eight million, four hundred sixty-nine thousand, nine hundred seventy-eight".