4000826978 has 8 divisors (see below), whose sum is σ = 6001626960. Its totient is φ = 2000284660.

The previous prime is 4000826933. The next prime is 4000826987. The reversal of 4000826978 is 8796280004.

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

It is a super-2 number, since 2×4000826978² = 32013233015785224968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19268 + ... + 91503.

It is an arithmetic number, because the mean of its divisors is an integer number (750203370).

Almost surely, 2^4000826978 is an apocalyptic number.

4000826978 is a deficient number, since it is larger than the sum of its proper divisors (2000799982).

4000826978 is a wasteful number, since it uses less digits than its factorization.

4000826978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128832.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 4000826978 is about 63252.0907006243. The cubic root of 4000826978 is about 1587.5104399090.

The spelling of 4000826978 in words is "four billion, eight hundred twenty-six thousand, nine hundred seventy-eight".