4099978 has 8 divisors (see below), whose sum is σ = 6158880. Its totient is φ = 2047020.

The previous prime is 4099961. The next prime is 4099981. The reversal of 4099978 is 8799904.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (769860).

Almost surely, 2^4099978 is an apocalyptic number.

4099978 is a deficient number, since it is larger than the sum of its proper divisors (2058902).

4099978 is a wasteful number, since it uses less digits than its factorization.

4099978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 4099978 is about 2024.8402406116. The cubic root of 4099978 is about 160.0517801158.

The spelling of 4099978 in words is "four million, ninety-nine thousand, nine hundred seventy-eight".