8429978 has 16 divisors (see below), whose sum is σ = 13106016. Its totient is φ = 4063920.

The previous prime is 8429963. The next prime is 8430013. The reversal of 8429978 is 8799248.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6548 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (819126).

Almost surely, 2^8429978 is an apocalyptic number.

8429978 is a deficient number, since it is larger than the sum of its proper divisors (4676038).

8429978 is a wasteful number, since it uses less digits than its factorization.

8429978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309.

The product of its digits is 290304, while the sum is 47.

The square root of 8429978 is about 2903.4424395879. The cubic root of 8429978 is about 203.5208059267.

It can be divided in two parts, 84 and 29978, that multiplied together give a palindrome (2518152).

The spelling of 8429978 in words is "eight million, four hundred twenty-nine thousand, nine hundred seventy-eight".